Enable clang compilation.

Previous clang/llvm bug was fixed.

BUG: 18790528
Change-Id: Ib12696030d34ebc3c3ef1bca3cad0139d631417e
diff --git a/Android.mk b/Android.mk
index 503bcb4..7906986 100644
--- a/Android.mk
+++ b/Android.mk
@@ -6,8 +6,6 @@
 LOCAL_MODULE := libmincrypt
 LOCAL_SRC_FILES := dsa_sig.c p256.c p256_ec.c p256_ecdsa.c rsa.c sha.c sha256.c
 LOCAL_CFLAGS := -Wall -Werror
-# Clang's slp-vectorize phase has segmentation fault when compiling p256_ec.c.
-LOCAL_CLANG_CFLAGS += -fno-slp-vectorize
 include $(BUILD_STATIC_LIBRARY)
 
 include $(CLEAR_VARS)