Update the ACRN documentation to use the official name of GVT-g
in ACRN to "AcrnGT" (ACRN-GT was previously widely used).
Also update the few occurences of "GVT-G" to "GVT-g" to be
consistent across our documentation. This includes a couple of
file name updates.
Signed-off-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
Geoffroy Van Cutsem