android: add a script to regenerate prebuilt config

since x86 CROSS_COMPILER removal, it can be hard to do that properly

Change-Id: I6011e3b4dac5b5e670385df4812baf32f2e5ebc5
build: ignore selibs pkgconfig on android builds

This cause errors and is not required

Change-Id: If6cc6fb1595e83fac452d8a28cb4b8d250dff06d