Running subsurface/packaging/android/build.sh after deleting
subsurface-mobile-build-arm directory fails for me due to missing
ssrf-version.h file. Just ignore if it doesn't exist.
Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
454a62c835