Try postsubmit_overrides for one mac build

Author: zanderso

ci/builders/mac_android_aot_engine.json

@@ -18,12 +18,16 @@
                 "cpu=x86"
             ],
             "gclient_variables": {
-                "download_android_deps": false
+                "download_android_deps": false,
+                "use_rbe": true
             },
             "gn": [
                 "--runtime-mode",
                 "profile",
-                "--android"
+                "--android",
+                "--rbe",
+                "--no-goma",
+                "--xcode-symlinks"
             ],
             "name": "android_profile",
             "ninja": {
@@ -33,6 +37,15 @@
                     "flutter/shell/platform/android:gen_snapshot"
                 ]
             },
+            "postsubmit_overrides": {
+                "gn": [
+                    "--runtime-mode",
+                    "profile",
+                    "--android",
+                    "--no-rbe",
+                    "--no-goma"
+                ]
+            },
             "properties": {
                 "$flutter/osx_sdk": {
                     "sdk_version": "15a240d"