openssl build broken on OSX

Looks like something broke in https://github.com/mapnik/mapnik-packaging/commit/a912197c8bc294011bf7cd867aaca0bb7dc0b856
**** unknown os/compiler version for your platform MacOSX ****

Configuring for 
Usage: Configure [no-<cipher> ...] [enable-<cipher> ...] [experimental-<cipher> ...] [-Dxxx] [-lxxx] [-Lxxx] [-fxxx] [-Kxxx] [no-hw-xxx|no-hw] [[no-]threads] [[no-]shared] [[no-]zlib|zlib-dynamic] [no-asm] [no-dso] [no-krb5] [sctp] [386] [--prefix=DIR] [--openssldir=OPENSSLDIR] [--with-xxx[=vvv]] [--test-sanity] os/compiler[:flags]

pick os/compiler from:
BC-32 BS2000-OSD BSD-generic32 BSD-generic64 BSD-ia64 BSD-sparc64 BSD-sparcv8 
BSD-x86 BSD-x86-elf BSD-x86_64 Cygwin Cygwin-pre1.3 DJGPP MPE/iX-gcc OS2-EMX 
OS390-Unix QNX6 QNX6-i386 ReliantUNIX SINIX SINIX-N UWIN VC-CE VC-WIN32 
VC-WIN64A VC-WIN64I aix-cc aix-gcc aix3-cc aix64-cc aix64-gcc android 
android-armv7 android-x86 aux3-gcc beos-x86-bone beos-x86-r5 bsdi-elf-gcc cc 
cray-j90 cray-t3e darwin-i386-cc darwin-ppc-cc darwin64-ppc-cc 
darwin64-x86_64-cc dgux-R3-gcc dgux-R4-gcc dgux-R4-x86-gcc dist gcc hpux-cc 
hpux-gcc hpux-ia64-cc hpux-ia64-gcc hpux-parisc-cc hpux-parisc-cc-o4 
hpux-parisc-gcc hpux-parisc1_1-cc hpux-parisc1_1-gcc hpux-parisc2-cc 
hpux-parisc2-gcc hpux64-ia64-cc hpux64-ia64-gcc hpux64-parisc2-cc 
hpux64-parisc2-gcc hurd-x86 iphoneos-cross irix-cc irix-gcc irix-mips3-cc 
irix-mips3-gcc irix64-mips4-cc irix64-mips4-gcc linux-alpha+bwx-ccc 
linux-alpha+bwx-gcc linux-alpha-ccc linux-alpha-gcc linux-aout linux-armv4 
linux-elf linux-generic32 linux-generic64 linux-ia32-icc linux-ia64 
linux-ia64-ecc linux-ia64-icc linux-ppc linux-ppc64 linux-sparcv8 
linux-sparcv9 linux-x86_64 linux32-s390x linux64-s390x linux64-sparcv9 mingw 
mingw64 ncr-scde netware-clib netware-clib-bsdsock netware-clib-bsdsock-gcc 
netware-clib-gcc netware-libc netware-libc-bsdsock netware-libc-bsdsock-gcc 
netware-libc-gcc newsos4-gcc nextstep nextstep3.3 osf1-alpha-cc osf1-alpha-gcc 
purify qnx4 rhapsody-ppc-cc sco5-cc sco5-gcc solaris-sparcv7-cc 
solaris-sparcv7-gcc solaris-sparcv8-cc solaris-sparcv8-gcc solaris-sparcv9-cc 
solaris-sparcv9-gcc solaris-x86-cc solaris-x86-gcc solaris64-sparcv9-cc 
solaris64-sparcv9-gcc solaris64-x86_64-cc solaris64-x86_64-gcc sunos-gcc 
tandem-c89 tru64-alpha-cc uClinux-dist uClinux-dist64 ultrix-cc ultrix-gcc 
unixware-2.0 unixware-2.1 unixware-7 unixware-7-gcc vos-gcc vxworks-mips 
vxworks-ppc405 vxworks-ppc60x vxworks-ppc750 vxworks-ppc750-debug 
vxworks-ppc860 vxworks-ppcgen vxworks-simlinux debug debug-BSD-x86-elf 
debug-Cygwin debug-VC-WIN32 debug-VC-WIN64A debug-VC-WIN64I debug-ben 
debug-ben-darwin64 debug-ben-debug debug-ben-debug-64 debug-ben-macos 
debug-ben-macos-gcc46 debug-ben-no-opt debug-ben-openbsd 
debug-ben-openbsd-debug debug-ben-strict debug-bodo debug-darwin-i386-cc 
debug-darwin-ppc-cc debug-geoff32 debug-geoff64 debug-levitte-linux-elf 
debug-levitte-linux-elf-extreme debug-levitte-linux-noasm 
debug-levitte-linux-noasm-extreme debug-linux-elf debug-linux-elf-noefence 
debug-linux-generic32 debug-linux-generic64 debug-linux-ia32-aes 
debug-linux-pentium debug-linux-ppro debug-linux-x86_64 debug-rse 
debug-solaris-sparcv8-cc debug-solaris-sparcv8-gcc debug-solaris-sparcv9-cc 
debug-solaris-sparcv9-gcc debug-steve-opt debug-steve32 debug-steve64 
debug-ulf debug-vos-gcc 

NOTE: If in doubt, on Unix-ish systems use './config'.
mapnik / mapnik-packaging

openssl build broken on OSX #149
