header (C) fixes
IPRT,Drivers: Committed a modified version of the diff_linux_guest_host patch. This mangles the IPRT symbols in kernel space on linux and later other platforms.
RTSemEventMultiWaitNoResume: corrected assertion in the new RTSemEventMultiWaitEx based implementation.
iprt/semaphore.h: Started adding RTSem*<Wait|Request>Ex[Debug].