Android GN: Include libstdc++.so when doing a component build

build/android/BUILD.gn

Index: build/android/BUILD.gn
diff --git a/build/android/BUILD.gn b/build/android/BUILD.gn
index 1b588230f1ba714c4486c6f4fd12ffb3688be5d0..87cc788676373c0b5bd1d507462fc3d3e162ea19 100644
--- a/build/android/BUILD.gn
+++ b/build/android/BUILD.gn
@@ -27,3 +27,32 @@ java_prebuilt("sun_tools_java") {
     ":find_sun_tools_jar",
   ]
 }
+
+action("cpplib_stripped") {
+  _strip_bin = "${android_tool_prefix}strip"
+  _soname = "libc++_shared.so"
+  _input_so = "${android_libcpp_root}/libs/${android_app_abi}/${_soname}"
+  _output_so = "${root_out_dir}/lib.stripped/${_soname}"
+
+  script = "//build/gn_run_binary.py"
+  inputs = [
+    _strip_bin,
+  ]
+  sources = [
+    _input_so,
+  ]
+  outputs = [
+    _output_so,
+  ]
+
+  _rebased_strip_bin = rebase_path(_strip_bin, root_out_dir)
+  _rebased_input_so = rebase_path(_input_so, root_out_dir)
+  _rebased_output_so = rebase_path(_output_so, root_out_dir)
+  args = [
+    _rebased_strip_bin,
+    "--strip-unneeded",
+    "-o",
+    _rebased_output_so,
+    _rebased_input_so,
+  ]
+}