Updated gnuc makefile to automatically retrieve version number from angelscript.h for the shared library file name


git-svn-id: http://svn.code.sf.net/p/angelscript/code@2060 404ce1b2-830e-0410-a2e2-b09542c77caf
Minor portability fixes for Linux

git-svn-id: http://svn.code.sf.net/p/angelscript/code@2061 404ce1b2-830e-0410-a2e2-b09542c77caf