crypto/tls: skip BadRSAClientKeyExchange-[4,5]

These two bogo tests mutate the version number used for the premaster
secret calculation for a client RSA key exchange, with the expectation
the server rejects the handshake.

Per the comment in the end of rsaKeyAgreement.processClientKeyExchange
we explicitly choose *not* to verify the version number.

This commit adds the two version number tests to the ignore list. They
coincidentally happen to produced the expected failure because they use
a non-default ciphersuite. When we add this ciphersuite to the client
config for the bogo test they will start to fail unless ignored.

Updates #72006

Change-Id: I27a2cd231e4b8762b0d9e2dbd3d8ddd5b87fd5c6
Reviewed-on: https://go-review.googlesource.com/c/go/+/669175
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>

src/crypto/tls/bogo_config.json

@@ -58,6 +58,9 @@
         "*Client-P-224*": "no P-224 support",
         "*Server-P-224*": "no P-224 support",
         "CurveID-Resume*": "unexposed curveID is not stored in the ticket yet",
+        "BadRSAClientKeyExchange-4": "crypto/tls doesn't check the version number in the premaster secret - see processClientKeyExchange comment",
+        "BadRSAClientKeyExchange-5": "crypto/tls doesn't check the version number in the premaster secret - see processClientKeyExchange comment",
+
         "CheckLeafCurve": "TODO: first pass, this should be fixed",
         "DisabledCurve-HelloRetryRequest-TLS13": "TODO: first pass, this should be fixed",
         "UnsupportedCurve": "TODO: first pass, this should be fixed",