Patch XTS out of ARMv7 bsaes too.

Bug: 256
Change-Id: I822274bf05901d82b41dc9c9c4e6d0b5d622f3ff
Reviewed-on: https://boringssl-review.googlesource.com/c/34871
Reviewed-by: Adam Langley <agl@google.com>

crypto/fipsmodule/aes/asm/bsaes-armv7.pl

@@ -1620,7 +1620,8 @@ bsaes_ctr32_encrypt_blocks:
 .size	bsaes_ctr32_encrypt_blocks,.-bsaes_ctr32_encrypt_blocks
 ___
 }
-{
+# In BorinSSL, we patch XTS support out.
+if (0) {
 ######################################################################
 # void bsaes_xts_[en|de]crypt(const char *inp,char *out,size_t len,
 #	const AES_KEY *key1, const AES_KEY *key2,