we need the make these variable to be environment variable. that will
allow us to use these variable in Makefile.
ie. we need to know the oem and userdata file system type when we
mount it. and that is defined in BoardConifg
Change-Id: I1c816214c60aba4761c34ad8b3d8f5611f81cfbb
Signed-off-by: Eddie Cai <eddie.cai.linux@gmail.com>
