add a new gb_LinkTarget_use_system_win32_libs to abstract different
linker options on MSVC and GCC.
Change-Id: Ic9bf2545f59bf7871e6fc06b290c486ddfbec03d
make 3.82 understands mixed paths, so use them.
This allows us to get rid of evil in BuildDirs.mk.
Hopefully, life will be simpler now.
Change-Id: I I I641f28c6af1948963f7004f8071af62e21caabb3
Naming convention for gbuild methods:
- "add" is used for stuff that is logically a part of the target
(i.e. not registered at the Module, but defined in the target's makefile)
- "use" is used for stuff that is logically a different target
(i.e. it is registered at the Module, has it's own makefile, may be
in a different module than the target)
