add runtime destination for make install target

[jeffmhastings]

I ran into some errors trying to build picotool on linux with cmake. It looks like there is a missing destination on the install command. I added RUNTIME DESTINATION based on the cmake install targets documentation.

cmake --version output

cmake --version
cmake version 3.13.4

CMake suite maintained and supported by Kitware (kitware.com/cmake).

This is the error that I originally encountered when trying to build picotool.

cmake .. output

-- The C compiler identification is GNU 8.3.0
-- The CXX compiler identification is GNU 8.3.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
Using PICO_SDK_PATH from environment ('../../pico-sdk/')
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.29") 
-- Checking for module 'libusb-1.0'
--   Found libusb-1.0, version 1.0.22
-- Found LIBUSB: /usr/lib/x86_64-linux-gnu/libusb-1.0.so  
CMake Error at CMakeLists.txt:63 (install):
  install TARGETS given no RUNTIME DESTINATION for executable target
  "picotool".

-- Configuring incomplete, errors occurred!
See also "/home/jeff/github.com/raspberrypi/picotool/build/CMakeFiles/CMakeOutput.log".

With my changes, the cmake .. error is resolved and make install works as expected.

cmake .. and make install output with changes

$ cmake ..
-- The C compiler identification is GNU 8.3.0
-- The CXX compiler identification is GNU 8.3.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
Using PICO_SDK_PATH from environment ('../../pico-sdk/')
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.29") 
-- Checking for module 'libusb-1.0'
--   Found libusb-1.0, version 1.0.22
-- Found LIBUSB: /usr/lib/x86_64-linux-gnu/libusb-1.0.so  
-- Configuring done
-- Generating done
-- Build files have been written to: /home/jeff/github.com/raspberrypi/picotool/build
$ sudo make install
Scanning dependencies of target picotool
[ 25%] Building CXX object CMakeFiles/picotool.dir/main.cpp.o
[ 50%] Building CXX object CMakeFiles/picotool.dir/picoboot_connection/picoboot_connection_cxx.cpp.o
[ 75%] Building C object CMakeFiles/picotool.dir/picoboot_connection/picoboot_connection.c.o
[100%] Linking CXX executable picotool
[100%] Built target picotool
Install the project...
-- Install configuration: "Release"
-- Installing: /usr/local/bin/picotool