uwimap was shipping an `include/unix.h` file that would be falsely
detected by many applications (e.g. php and its modules). Due to that
file we got hacks like 8c125c0c74.
This also adds some previously missing files that would normally be
installed by uwimap (linkage.c, osdep/unix/*.h, …)
The following parameters are now available:
* hardeningDisable
To disable specific hardening flags
* hardeningEnable
To enable specific hardening flags
Only the cc-wrapper supports this right now, but these may be reused by
other wrappers, builders or setup hooks.
cc-wrapper supports the following flags:
* fortify
* stackprotector
* pie (disabled by default)
* pic
* strictoverflow
* format
* relro
* bindnow