MB: Move iOS GYP bots to use limited support config

webrtc/build/ios/tryserver.webrtc/ios64_gyp_dbg.json

 {
   "owners": [
     "kjellander"
   ],
   "comments": [
     "GN + Ninja builder.",
     "GYP_DEFINES and gn_args in this file are only used during runhooks; ",
     "webrtc/build/mb_config.pyl decides the generated projects that are compiled."
   ],
   "xcode version": "7.0",
   "GYP_DEFINES": [
     "use_goma=1",
     "gomadir=$(goma_dir)",
     "chromium_ios_signing=0",
     "component=static_library",
-    "target_arch=arm64"
+    "target_arch=arm64",
+    "include_examples=0",
+    "include_tests=0",
+    "include_ilbc=0",
+    "build_expat=0",
+    "build_json=0",
+    "build_libevent=0",
+    "build_libjpeg=0",
+    "build_libsrtp=0",
+    "build_libvpx=0",
+    "build_libyuv=0",
+    "build_openmax_dl=0",
+    "build_opus=0",
+    "build_protobuf=0",
+    "build_ssl=0",
+    "build_usrsctp=0",
+    "enable_video=0",
+    "linux_use_bundled_binutils=0",
+    "rtc_use_openmax_dl=1",
+    "use_openssl=1",
+    "use_x11=0",
+    "use_gtk=0"
   ],
   "gn_args": [
     "is_debug=true",
     "target_os=\"ios\"",
     "ios_enable_code_signing=false",
     "is_component_build=false",
     "use_goma=true",
     "goma_dir=\"$(goma_dir)\"",
     "target_cpu=\"arm64\""
   ],
   "mb_type": "gyp",
   "use_analyze": false,
   "compiler": "ninja",
   "additional_compile_targets": [ "all" ],
   "configuration": "Debug",
   "sdk": "iphoneos9.0",
   "tests": [
   ]
 }