Fixes for 32-bit official GN build.
Uses the host toolchain for the dump symbol and stack walk utilities.
Remove the dummy nacl target when nacl is disabled. Previously there was a dummy nacl target but no dummy nacl_helper target. They should be consistent. It turns out we use neither when nacl is disabled, so I removed the existing one.
Unrelated: Update GN quick start with a link to the new sites page I made
for build arguments.
Review URL: https://codereview.chromium.org/1339653004
Cr-Original-Commit-Position: refs/heads/master@{#348477}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 314880aa20d7e71bc01515afa7b9c82e763f4218
diff --git a/tools/gn/docs/quick_start.md b/tools/gn/docs/quick_start.md
index c884edb..ae06b96 100644
--- a/tools/gn/docs/quick_start.md
+++ b/tools/gn/docs/quick_start.md
@@ -50,6 +50,10 @@
build directory for this command because the available arguments can
change according to what's set.
+Chrome developers can also read the [Chrome-specific build
+configuration](http://www.chromium.org/developers/gn-build-configuration)
+instructions for more information.
+
## Cross-compiling to a target OS or architecture
Run `gn args out/Default` (substituting your build directory as needed) and
