header (C) fixes
Use DECLHIDDEN, especially in IPRT.
IPRT: Visual C++ warnings.
Automated rebranding to Oracle copyright/license strings via filemuncher
IPRT,HostDrv,AddDrv: Export public IPRT symbols for the linux kernel (pain).
Runtime/rand: compiler warnings / typecast fixes
iprt: Implemented the /dev/urandom base random generator as a RTRAND opaque. Made the simple RTRand API just serve as a wrapper using the RTRandAdv API with a global RTRAND handle.
export