do gmcs checks for darwin platforms

fixes #5
Merge pull request #7 from wjwwood/gmcs_checking_osx

do gmcs checks for darwin platforms
Version 6.4 Community Edition Update
Version 6.4 Community Edition Update
OSPL-4171 stopped building opensplice-test on win7e [pg]
OSPL-4171 fixed typo [pg]
Version 6.4 Community Edition Update
Version 6.4 Community Edition Update
Version 6.4 Community Edition Update
Version 6.4 Community Edition Update
Version 6.4 Community Edition Update
Version 6.4 Community Edition Update
Version 6.4 Community Edition Update
Add minimal build support
enable configure and build
change bash settings to avoid bombing out during configure
Some minor fixes for OSX related to libraries (linking shared libs and DYLD
vs. LD).
Add minimal CMake wrapper to build and install
Make invocation of make for retrieving host and and version robust to running
inside a recursive make context, where stdout might include distracting output
like 'make[4]: Entering directory'
Fix installation directory structure