add gn_all, gyp_all targets to build files, remove GN's //:root

build/secondary/tools/grit/grit_rule.gni

Index: build/secondary/tools/grit/grit_rule.gni
diff --git a/build/secondary/tools/grit/grit_rule.gni b/build/secondary/tools/grit/grit_rule.gni
index cdaf0f272282f693ecd36763f2cae92f8e275097..626fd745d8a9dc505b59cd4a10ad7951de1def18 100644
--- a/build/secondary/tools/grit/grit_rule.gni
+++ b/build/secondary/tools/grit/grit_rule.gni
@@ -53,6 +53,8 @@
 #   use_qualified_include (optional)
 #       If set, output_dir is not added to include_dirs.
 #
+#   configs (optional)
+#       List of additional configs to be applied to the generated target.
 #   deps  (optional)
 #   inputs  (optional)
 #       List of additional files, required for grit to process source file.
@@ -438,6 +440,10 @@ template("grit") {
       public_configs += invoker.public_configs
     }
 
+    if (defined(invoker.configs)) {
+      configs += invoker.configs
+    }
+
     if (defined(invoker.visibility)) {
       visibility = invoker.visibility
     }