libhidl_test: fatal -> error warning

Avoid stopping the compiler.

Fixes: 178056347
Test: build only
Change-Id: Icdd0e0002c60774fea07452c06a58a3bed0fb236
diff --git a/test_main.cpp b/test_main.cpp
index 0a1e97b..ea4dfd1 100644
--- a/test_main.cpp
+++ b/test_main.cpp
@@ -17,7 +17,7 @@
 #define LOG_TAG "LibHidlTest"
 
 #pragma clang diagnostic push
-#pragma clang diagnostic fatal "-Wpadded"
+#pragma clang diagnostic error "-Wpadded"
 #include <hidl/HidlInternal.h>
 #include <hidl/HidlSupport.h>
 #pragma clang diagnostic pop