Merge : re-applies missing part of fix for Bug 2901,Add export for s60ibymacros.pm
The File <STLport-5.1.0\stlport\stl\config\stl_mycomp.h> has been manually configured, in order for it to recognise the g++ compiler.
The Change is made to the _STLP_NATIVE_INCLUDE_PATH macro, by uncommenting it, and removing the path (../include) being pointed to by it.