[webcrypto] Add some more layouttests for crypto.subtle.digest()

LayoutTests/crypto/sign-verify-expected.txt

Index: LayoutTests/crypto/sign-verify-expected.txt
diff --git a/LayoutTests/crypto/sign-verify-expected.txt b/LayoutTests/crypto/sign-verify-expected.txt
index 754a136be9983e7b0191db7d744c22ef234da978..23e6bc613f7cc606518f87c6afd2bbfcc4fc4e7b 100644
--- a/LayoutTests/crypto/sign-verify-expected.txt
+++ b/LayoutTests/crypto/sign-verify-expected.txt
@@ -15,7 +15,7 @@ PASS crypto.subtle.sign({name: 'hmac', hash: null}, keys.hmacSha1, data) threw e
 PASS crypto.subtle.sign({name: 'hmac', hash: {}}, keys.hmacSha1, data) threw exception TypeError: Algorithm: HMAC: HmacParams: hash: Algorithm: name: Missing or not a string.
 PASS crypto.subtle.sign({name: 'hmac', hash: {name: 'foo'}}, keys.hmacSha1, data) threw exception NotSupportedError: Algorithm: HMAC: HmacParams: hash: Algorithm: Unrecognized algorithm name.
 PASS crypto.subtle.sign({name: 'hmac', hash: {name: 'AES-CBC'}}, keys.hmacSha1, data) threw exception NotSupportedError: Algorithm: HMAC: HmacParams: hash: Algorithm: AES-CBC: Unsupported operation.
-PASS signResult is '[89 0d 9b 89 4b 23 97 69 ac 77 25 04 66 dc e4 2a f9 26 ed 76]'
+PASS: HMAC SHA1 signature should be [890d9b894b239769ac77250466dce42af926ed76] and was
 PASS verifyResult is true
 PASS verifyResult is false
 PASS successfullyParsed is true