Add a custom do_compile step to build the ext2simg_android utility (ext2simg)
when building for the native class.
This can be used to generate ext* based sparse image
Signed-off-by: AshishKumar Mishra <emailaddress.ashish@gmail.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>