[fuchsia] Add tests group

We'll indirect through this group while we rename crashpad{_,-}tests.

Bug: fuchsia:22679
Change-Id: I15be4f747cf5def3b6404b35a83d027323ef34ac
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/2315003
Reviewed-by: Scott Graham <scottmg@chromium.org>
Commit-Queue: Scott Graham <scottmg@chromium.org>
Commit-Queue: Tamir Duberstein <tamird@google.com>
GitOrigin-RevId: 1a64e1cdc6586f4f6fdec21c2e8c64d7ee36c322
diff --git a/BUILD.gn b/BUILD.gn
index 833079e..c804e3e 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -174,6 +174,10 @@
         },
       ]
     }
+
+    group("tests") {
+      deps = [ ":crashpad_test" ]
+    }
   }
 } else if (crashpad_is_standalone || crashpad_is_external) {
   test("crashpad_client_test") {