GN: Fix Android component build

build/config/BUILDCONFIG.gn

Index: build/config/BUILDCONFIG.gn
diff --git a/build/config/BUILDCONFIG.gn b/build/config/BUILDCONFIG.gn
index 890d33e0659e0d0b9ed1bf41b5e572979742b177..4dd85f37b184de48de08b6ede200d86d29947115 100644
--- a/build/config/BUILDCONFIG.gn
+++ b/build/config/BUILDCONFIG.gn
@@ -26,7 +26,7 @@ declare_args() {
   symbol_level = -1
 
   # Component build.
-  is_component_build = false
+  is_component_build = os == "android"

[jamesr, 2014/10/20 23:11:24]

huh? why would this be the default? the production builds on android are not
component, nor is gyp

[cjhopman, 2014/10/21 00:19:06]

Yeah, the production builds also have is_debug = false, and on linux (I believe)
have is_clang = false.

I think the defaults should be set up for the best developer experience, rather
than be set up to match production builds. We have long wanted to change the
default on Android to be component builds (and is_clang=true by default, too).

That being said, this isn't an important part of this change. I'll take it out
and try to do it in a different change sometime and then we can focus discussion
about it there. 

I think the bot should use the component build since it's more strict, though,
so we'll just have to update the recipe for that.

   # Debug build.
   is_debug = true