Add binary packages for Fletcher runtime and Fletchgen

[mbrobbel]

This adds support to build binary packages and archives (DEB, RPM and TGZ) for the Fletcher runtime. This should make it a lot easier to install the runtime. Users don't have to build from source.

This generates the following now:

• fletcher-0.0.15-1.x86_64.rpm

  > rpm -qilR fletcher-0.0.15-1.x86_64.rpm
  Name        : fletcher
  Version     : 0.0.15
  Release     : 1
  Architecture: x86_64
  Install Date: (not installed)
  Group       : unknown
  Size        : 948883
  License     : ASL 2.0
  Signature   : (none)
  Source RPM  : fletcher-0.0.15-1.src.rpm
  Build Date  : Thu Jan  7 15:48:19 2021
  Build Host  : b9452c11722f
  Relocations : /usr
  Vendor      : Accelerated Big Data Systems, Delft University of Technology
  Summary     : The Fletcher runtime library
  Description :
  The Fletcher C++ runtime library for Fletcher-based applications
  /bin/sh
  /bin/sh
  /bin/sh
  /bin/sh
  arrow-libs >= 1.0.1
  rpmlib(CompressedFileNames) <= 3.0.4-1
  rpmlib(FileDigests) <= 4.6.0-1
  rpmlib(PayloadFilesHavePrefix) <= 4.0-1
  /usr/include/fletcher
  /usr/include/fletcher/api.h
  /usr/include/fletcher/arrow-recordbatch.h
  /usr/include/fletcher/arrow-schema.h
  /usr/include/fletcher/arrow-utils.h
  /usr/include/fletcher/common.h
  /usr/include/fletcher/context.h
  /usr/include/fletcher/fletcher.h
  /usr/include/fletcher/hex-view.h
  /usr/include/fletcher/kernel.h
  /usr/include/fletcher/logging.h
  /usr/include/fletcher/meta
  /usr/include/fletcher/meta/meta.h
  /usr/include/fletcher/platform.h
  /usr/include/fletcher/status.h
  /usr/include/fletcher/timer.h
  /usr/lib/libfletcher.so

• fletcher-0.0.15-Linux.tar.gz

  > tar -tvf fletcher-0.0.15-Linux.tar.gz
  drwxr-xr-x root/root         0 2021-01-07 15:48 include/
  drwxr-xr-x root/root         0 2021-01-07 15:48 include/fletcher/
  -rw-r--r-- root/root      1124 2020-11-19 08:56 include/fletcher/api.h
  -rw-r--r-- root/root      5995 2020-11-19 08:56 include/fletcher/context.h
  -rw-r--r-- root/root      4911 2020-11-19 08:56 include/fletcher/kernel.h
  -rw-r--r-- root/root      8640 2020-11-19 08:56 include/fletcher/platform.h
  -rw-r--r-- root/root      2477 2020-11-19 08:56 include/fletcher/status.h
  drwxr-xr-x root/root         0 2021-01-07 15:48 lib/
  -rw-r--r-- root/root    897888 2021-01-07 15:43 lib/libfletcher.so

• fletcher_0.0.15_amd64.deb

  > dpkg -I fletcher_0.0.15_amd64.deb
  new Debian package, version 2.0.
  size 209500 bytes: control archive=798 bytes.
   323 bytes,    11 lines      control
   982 bytes,    15 lines      md5sums
  Architecture: amd64
  Depends: libarrow-dev (>= 1.0.1)
  Description: The Fletcher runtime library
  The Fletcher C++ runtime library for Fletcher-based applications
  Maintainer: Accelerated Big Data Systems, Delft University of Technology
  Package: fletcher
  Priority: optional
  Section: devel
  Version: 0.0.15
  Installed-Size: 947
  > dpkg --contents fletcher_0.0.15_amd64.deb
  drwxr-xr-x root/root         0 2021-01-07 15:48 ./usr/
  drwxr-xr-x root/root         0 2021-01-07 15:48 ./usr/include/
  drwxr-xr-x root/root         0 2021-01-07 15:48 ./usr/include/fletcher/
  -rw-r--r-- root/root      1124 2020-11-19 08:56 ./usr/include/fletcher/api.h
  -rw-r--r-- root/root      3384 2020-11-19 08:56 ./usr/include/fletcher/arrow-recordbatch.h
  -rw-r--r-- root/root      3848 2020-11-19 08:56 ./usr/include/fletcher/arrow-schema.h
  -rw-r--r-- root/root      7450 2020-11-19 08:56 ./usr/include/fletcher/arrow-utils.h
  -rw-r--r-- root/root       852 2020-11-19 08:56 ./usr/include/fletcher/common.h
  -rw-r--r-- root/root      5995 2020-11-19 08:56 ./usr/include/fletcher/context.h
  -rw-r--r-- root/root      2011 2020-11-19 08:56 ./usr/include/fletcher/fletcher.h
  -rw-r--r-- root/root      1458 2020-11-19 08:56 ./usr/include/fletcher/hex-view.h
  -rw-r--r-- root/root      4911 2020-11-19 08:56 ./usr/include/fletcher/kernel.h
  -rw-r--r-- root/root      4452 2020-11-19 08:56 ./usr/include/fletcher/logging.h
  drwxr-xr-x root/root         0 2021-01-07 15:48 ./usr/include/fletcher/meta/
  -rw-r--r-- root/root      2348 2020-11-19 08:56 ./usr/include/fletcher/meta/meta.h
  -rw-r--r-- root/root      8640 2020-11-19 08:56 ./usr/include/fletcher/platform.h
  -rw-r--r-- root/root      2477 2020-11-19 08:56 ./usr/include/fletcher/status.h
  -rw-r--r-- root/root      2045 2020-11-19 08:56 ./usr/include/fletcher/timer.h
  drwxr-xr-x root/root         0 2021-01-07 15:48 ./usr/lib/
  -rw-r--r-- root/root    897888 2021-01-07 15:43 ./usr/lib/libfletcher.so