[fidl][go] Set hard timeout at 2m for FIDL tests

Change-Id: Ief20e150dda986f2d82944cc666c9d6bea90c62c
diff --git a/BUILD.gn b/BUILD.gn
index c47d358..b5db94e 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -152,9 +152,17 @@
   tests = [
     {
       name = "go_fidl_test"
+      args = [
+        "--test.timeout",
+        "2m",
+      ]
     },
     {
       name = "go_extended_fidl_test"
+      args = [
+        "--test.timeout",
+        "2m",
+      ]
     },
   ]
 }