Keep ios_app_bundle final executable target name unchanged in fat 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 b0d248b107cc6b56e74b5ef0d59e06e49481372f..03c401ceb63a2ee4a3f17cc21a99d1deb9840748 100644
--- a/build/config/ios/rules.gni
+++ b/build/config/ios/rules.gni
@@ -211,7 +211,7 @@ template("ios_app_bundle") {
       ]
     }
 
-    _link_executable = _target_name + "_link_executable"
+    _link_executable = _target_name + "_executable"
     _executable_path = "$target_out_dir/$_output_name"
 
     if (ios_enable_code_signing) {
@@ -226,11 +226,12 @@ template("ios_app_bundle") {
     # the same role as the "executable" target in a thin build, copy the
     # visibility and redefine some variables.
     if (_is_fat_build) {
-      _lipo_executable = _target_name + "_lipo_executable"
+      _lipo_executable = _link_executable
       _lipo_executable_visibility = _link_executable_visibility
 
       _link_executable_visibility = []
       _link_executable_visibility = [ ":$_lipo_executable" ]
+      _link_executable = _target_name + "_arch_executable"
 
       _arch_executable_path = "$target_out_dir/$current_cpu/$_output_name"
     }