Implement AES-GCM in tlslite.

net/test/spawned_test_server/base_test_server.h

Index: net/test/spawned_test_server/base_test_server.h
diff --git a/net/test/spawned_test_server/base_test_server.h b/net/test/spawned_test_server/base_test_server.h
index 73ac855b6734cb8c7f647853cee7aa97af81e994..a43df110a7c55bf275829f15b22b468ff3a441fc 100644
--- a/net/test/spawned_test_server/base_test_server.h
+++ b/net/test/spawned_test_server/base_test_server.h
@@ -90,16 +90,18 @@ class BaseTestServer {
     enum BulkCipher {
       // Special value used to indicate that any algorithm the server supports
       // is acceptable. Preferred over explicitly OR-ing all ciphers.
-      BULK_CIPHER_ANY    = 0,
+      BULK_CIPHER_ANY = 0,
 
-      BULK_CIPHER_RC4    = (1 << 0),
+      BULK_CIPHER_RC4 = (1 << 0),
       BULK_CIPHER_AES128 = (1 << 1),
       BULK_CIPHER_AES256 = (1 << 2),
 
       // NOTE: 3DES support in the Python test server has external
       // dependencies and not be available on all machines. Clients may not
       // be able to connect if only 3DES is specified.
-      BULK_CIPHER_3DES   = (1 << 3),
+      BULK_CIPHER_3DES = (1 << 3),
+
+      BULK_CIPHER_AES128GCM = (1 << 4),
     };
 
     // NOTE: the values of these enumerators are passed to the the Python test