ext4_utils: fix utility build (libmincrypt)

external/libselinux/src/android.c:702: error: undefined reference to 'SHA_hash'
collect2: error: ld returned 1 exit status
make: *** [/opt/jenkins/android/workspace/android/cm-11.0/out/target/product/galaxysmtd/obj/UTILITY_EXECUTABLES/utility_make_ext4fs_intermediates/LINKED/make_ext4fs] Error 1

Change-Id: Ie43cefffae1aae74072abc30eba5d8010619b9d8