Put the rest of lib/System into LinkAllVMCore.h. This makes all of
lib/System available to programs that #include LinkALlVMCore.h so that
loadable modules linked into those programs can depend on all of lib/System
being available.
llvm-svn: 29288
* Consolidate implementation for Unix systems into Unix/Signals.cpp
* Avoid use of symbolic link to #include platform-specific implementation.
llvm-svn: 19153