Fix HMAC compat layer function for SHA-1.

This function would only accept the string "SHA" for SHA-1-based HMAC, but it
should also accept "SHA1." This is similar to how wolfSSL_EVP_get_digestbyname
allows both "SHA" and "SHA1." We didn't have a test for this in api.c. I added
one, and it failed before my fix here.

tests/api.c

@@ -39202,6 +39202,9 @@ static int test_wolfSSL_HMAC(void)
             test_openssl_hmac(EVP_sha3_512(), (int)WC_SHA3_512_DIGEST_SIZE);
         #endif
     #endif
+    #ifndef NO_SHA
+        test_openssl_hmac(EVP_sha1(), (int)WC_SHA_DIGEST_SIZE);
+    #endif
 
     printf(resultFmt, passed);
 #endif