secur32/tests: Use win_skip() to skip over unimplemented functionality.

dlls/secur32/tests/ntlm.c

@@ -1292,7 +1292,7 @@ START_TEST(ntlm)
         test_cred_multiple_use();
     }
     else
-        skip("Needed functions are not available\n");
+        win_skip("Needed functions are not available\n");
 
     if(secdll)
         FreeLibrary(secdll);

dlls/secur32/tests/schannel.c

@@ -173,7 +173,7 @@ static void testAcquireSecurityContext(void)
         !pEnumerateSecurityPackagesA || !pFreeContextBuffer ||
         !pFreeCredentialsHandle || !pCryptAcquireContextW)
     {
-        skip("Needed functions are not available\n");
+        win_skip("Needed functions are not available\n");
         return;
     }