(Temporarily?) disable building JS targets on mac hosts

services/BUILD.gn

Index: services/BUILD.gn
diff --git a/services/BUILD.gn b/services/BUILD.gn
index 81c59ab7a12781c6d3b2795e998d7d208eab9cb0..ef4503164449a5c7b79ee9b08bb23d40e168cc52 100644
--- a/services/BUILD.gn
+++ b/services/BUILD.gn
@@ -13,7 +13,6 @@ group("services") {
     "//services/gles2:lib",
     "//services/http_server",
     "//services/icu_data",
-    "//services/js",
     "//services/kiosk_wm",
     "//services/native_viewport",
     "//services/reaper",
@@ -37,4 +36,10 @@ group("services") {
   if (is_linux) {
     deps += [ "//services/python" ]
   }
+
+  # TODO(jamesr): We only support building V8 snapshot data on a linux host since it
+  # needs a 32 bit toolchain and we don't have one configured for mac hosts.
+  if (host_os == "linux") {
+    deps += [ "//services/js" ]
+  }
 }