Fixed typo in code comment.

[skip ci]
Reviewed-by: NTim Hudson <tjh@openssl.org>
Reviewed-by: NMatthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9102)

(cherry picked from commit 87762939b508c7968d3c54d44c1319416c27603e)

test/evp_extra_test.c

@@ -300,7 +300,7 @@ static const unsigned char kExampleECPubKeyDER[] = {
 };
 
 /*
- * kExampleBadECKeyDER is a sample EC public key with a wrong OID
+ * kExampleBadECPubKeyDER is a sample EC public key with a wrong OID
  * 1.2.840.10045.2.2 instead of 1.2.840.10045.2.1 - EC Public Key
  */
 static const unsigned char kExampleBadECPubKeyDER[] = {