OptionRomPkg: Add FrameBufferBltLib implementation of BltLib

OptionRomPkg: Add FrameBufferBltLib implementation of BltLib

This BltLib implementation will act on the BltLib functions by
directly manipulating a memory framebuffer.  Therefore, it
should be usable by a Graphics Output Protocol (GOP) driver
to easily implement the GOP Blt function whenever a memory
framebuffer is available.

It can also be used in any situation where code would prefer to
not call the GOP Blt function, and would rather update the
framebuffer directly.  (Assuming a framebuffer is available
for the graphics device.)

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11521 6f19259b-4bc3-4df7-8a09-765794883524