adb: Improved detection of big endian architecture

Instead of testing for the (compiler specific) define
__ppc__ explicitly, use the define HAVE_BIG_ENDIAN provided by
AndroidConfig.h.  That way, it should work on all big endian
systems.

Change-Id: Ic4d62afcefce4c8ad5716178ebfcb2b055ac73ce
3 files changed