Add GN targets for codesighs and telemetry

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 0aee2668956ba5fb7907a1cf67114b3f3cc3b733..1039a043cfff727ed11a3079c75f3f26972c0002 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -54,6 +54,7 @@ group("root") {
     "//extensions/common",
     "//extensions/common/api",
     "//extensions/renderer",
+    "//extensions/shell:app_shell_unittests",
     "//gin",
     "//gpu",
     "//google_apis",
@@ -83,6 +84,7 @@ group("root") {
     "//third_party/cacheinvalidation",
     "//third_party/cld",
     "//third_party/cld_2",
+    "//third_party/codesighs",
     "//third_party/ffmpeg",
     "//third_party/flac",
     "//third_party/harfbuzz-ng",
@@ -118,6 +120,7 @@ group("root") {
     "//third_party:jpeg",
     "//tools/gn",
     "//tools/imagediff($host_toolchain)",
+    "//tools/telemetry:bitmaptools",
     "//ui/accessibility",
     "//ui/app_list",
     "//ui/aura",