Fix names in .def file which caused Sunos Debug builds to fail (why didn't any other builds fail?)

security/nss/lib/nss/nss.def

@@ -478,8 +478,8 @@ PK11_CheckSSOPassword;
 PK11_GetIVLength;
 PK11_GetKeyData;
 PK11_GetKeyType;
-PK11_GEtLowLevelKeyIDForCert;
-PK11_GEtLowLevelKeyIDForPrivateKey;
+PK11_GetLowLevelKeyIDForCert;
+PK11_GetLowLevelKeyIDForPrivateKey;
 PK11_ImportCertForKey;
 PK11_IsLoggedIn;
 PK11_Logout;