Mac toolchain: take output_dir into account for .dSYM

build/toolchain/mac/BUILD.gn

Index: build/toolchain/mac/BUILD.gn
diff --git a/build/toolchain/mac/BUILD.gn b/build/toolchain/mac/BUILD.gn
index 0c00e995fffe139ac39badd12790acbad3a78a7a..90e639a2ef904a6e18a6f5893a44256d3ba59feb 100644
--- a/build/toolchain/mac/BUILD.gn
+++ b/build/toolchain/mac/BUILD.gn
@@ -137,9 +137,9 @@ template("mac_toolchain") {
 
     # If dSYMs are enabled, this flag will be added to the link tools.
     if (_enable_dsyms) {
-      dsym_switch = " -Wcrl,dsym,{{root_out_dir}} "
+      dsym_switch = " -Wcrl,dsym,{{output_dir}} "
       dsym_output_dir =
-          "{{root_out_dir}}/{{target_output_name}}{{output_extension}}.dSYM"
+          "{{output_dir}}/{{target_output_name}}{{output_extension}}.dSYM"
       dsym_output = [
         "$dsym_output_dir/",
         "$dsym_output_dir/Contents/Info.plist",
@@ -151,7 +151,8 @@ template("mac_toolchain") {
     }
 
     if (_save_unstripped_output) {
-      _unstripped_output = "{{root_out_dir}}/{{target_output_name}}{{output_extension}}.unstripped"
+      _unstripped_output =
+          "{{output_dir}}/{{target_output_name}}{{output_extension}}.unstripped"
     }
 
     tool("cc") {