Move to shared libmincrypt

Remove mincrypt source from TWRP and add rule to make
libmincrypt as a shared library.
No more crashes during zip signature verification and
less code to maintain in TWRP.
diff --git a/prebuilt/Android.mk b/prebuilt/Android.mk
index 58268f9..17e2d4a 100644
--- a/prebuilt/Android.mk
+++ b/prebuilt/Android.mk
@@ -38,6 +38,7 @@
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libbmlutils.so
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libflashutils.so
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libstlport.so
+RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libmincrypt.so
 ifeq ($(TW_INCLUDE_BLOBPACK), true)
     RELINK_SOURCE_FILES += $(TARGET_RECOVERY_ROOT_OUT)/sbin/blobpack
 endif