core: Add some static libraries

 * Add static versions of libdiskconfig and libsysutils for MiniVold

Change-Id: I9ea9498dcff3f094bbcbb1e05e6d10bc9b83ac74

Conflicts:
	libsysutils/Android.mk
Add libminshacrypt static lib

This is a sha-only version of libmincrypt, to provide the new
SHA_hash implementation to binaries that require libcrypto_static