Update NSS to 3.38

- Added HACL*Poly1305 32-bit (INRIA/Microsoft)
- Updated to final TLS 1.3 draft version (28)
- Removed TLS 1.3 prerelease draft limit check
- Removed NPN code
- Enabled dev/urandom-only RNG on Linux with NSS_SEED_ONLY_DEV_URANDOM for non-standard environments
- Fixed several bugs with TLS 1.3 negotiation
- Updated internal certificate store
- Added support for the TLS Record Size Limit Extension.
- Fixed CVE-2018-0495
- Various security fixes in the ASN.1 code.

security/nss/lib/freebl/blake2b.c

@@ -180,7 +180,7 @@ blake2b_Begin(BLAKE2BContext* ctx, uint8_t outlen, const uint8_t* key,
     return SECSuccess;
 
 failure:
-    PORT_Memset(&ctx, 0, sizeof(ctx));
+    PORT_Memset(ctx, 0, sizeof(*ctx));
     PORT_SetError(SEC_ERROR_INVALID_ARGS);
     return SECFailure;
 }