in favor of add_compile_options and the like with generator expressions
Also take this as an opportunity to remove the C++11 standard hack, GCC 8 now defaults to C++14
Since binutils can not add this, we re-introduce pefixup.
It searches for the exported symbol '_load_config_used',
and uses that to fill out the LOAD_CONFIG directory in the PE header
Dynamically check for sys/types.h and pid_t in wine config.h
Use TARGET_xxx defines instead of _X86_ as this is undefined by GCC
Add some sense in include directories management by using interface
libraries
