[iOS/GN] Fix generation of .dSYM for fat binary builds.

build/config/ios/rules.gni

Index: build/config/ios/rules.gni
diff --git a/build/config/ios/rules.gni b/build/config/ios/rules.gni
index e77430ae9d809520ba01e0c7637a69eb51c483e6..723354bf378c4c22622cd672753c5d91c9dad965 100644
--- a/build/config/ios/rules.gni
+++ b/build/config/ios/rules.gni
@@ -4,6 +4,7 @@
 
 import("//build/config/ios/ios_sdk.gni")
 import("//build/config/mac/base_rules.gni")
+import("//build/config/mac/symbols.gni")
 
 # Generates Info.plist files for Mac apps and frameworks.
 #
@@ -279,7 +280,7 @@ template("ios_app_bundle") {
       action(_lipo_executable) {
         forward_variables_from(invoker, [ "testonly" ])
         visibility = _lipo_executable_visibility
-        script = "//build/config/mac/xcrun.py"
+        script = "//build/toolchain/mac/linker_driver.py"
         outputs = [
           _executable_path,
         ]
@@ -296,11 +297,21 @@ template("ios_app_bundle") {
                                      "root_out_dir") + "/$_output_name" ]
         }
         args = [
+                 "xcrun",
                  "lipo",
                  "-create",
                  "-output",
                  rebase_path(outputs[0], root_build_dir),
                ] + rebase_path(inputs, root_build_dir)
+
+        if (enable_dsyms) {
+          outputs += [ "$root_out_dir/$_output_name.dSYM/" ]
+          args +=
+              [ "-Wcrl,dsym," + rebase_path("$root_out_dir/.", root_build_dir) ]
+        }
+        if (enable_stripping) {
+          args += [ "-Wcrl,strip,-x,-S" ]
+        }
       }
     }