Define an "all" target for the chrome/updater.

It would be nice to have a group target that builds all the targets
in the chrome/updater so it is easier to build everything locally,
when needed.

Bug: 1167572

Change-Id: I4ee56b21cd4d461bf7bded3b8dcb5ffc2dce3c89
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2635110Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Commit-Queue: Sorin Jianu <sorin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844840}

chrome/updater/BUILD.gn

@@ -25,6 +25,17 @@ group("updater") {
   }
 }
 
+group("all") {
+  testonly = true
+
+  if (is_win || is_mac) {
+    deps = [
+      ":updater",
+      "//chrome/updater/test/test_app",
+    ]
+  }
+}
+
 # Conditional build is needed, otherwise the analyze script on Linux
 # requires all targets and it is going to include the targets below.
 if (is_win || is_mac) {