Android: Remove libxml2 config defines
These need to be done in the libxml2 build, not in hs20-osu-client. This
workaround was previously used to allow parts of the build to go
through, but that was not a complete fix and resulted in warnings now
that external/libxml2 in Android 5.0 is defining the same parameters.
Remove these from hs20-osu-client Android.mk to avoid that warning.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Jouni Malinen