Bug 982138 - Ignore #* in aapt invocations in mobile/android/base. r=blassey
Bug 979388 - Make aapt invocation rebuild R.java. r=glandium

This commit adds an empty recipe to dependencies of .aapt.deps, which
forces the appropriate gecko-R.jar rebuild.  This is because Make treats
targets with no recipe at all differently than targets with an empty
recipe, in a way that defeats our dependencies.

What appeared to be happening is the following:

Touch a resource.  On the next build, .aapt.deps is stale, so aapt is
invoked, which generates R.java, and we touch .aapt.deps.

Now R.java depends on .aapt.deps, but this does not appear to force Make
to consider targets that depend on R.java to be stale.  A target that
depends on R.java (such as gecko-R.jar) itself compares timestamps and
finds that gecko-R.jar is newer than R.java (from the previous build),
and this comparison appears to happen before aapt is invoked.  So even
though .aapt.deps is seen to be stale, and by transitivity R.java is
stale, this does not mark gecko-R.jar as stale.  The timestamp check
between R.java and gecko-R.jar appears to happen *before* aapt is
invoked.

On the second build following the update, the R.java generated in the
previous build is newer than gecko-R.jar, triggering the observed
rebuild of gecko-R.jar.
Bug 979537 - Make geckoview_resources.zip include res/values/strings.xml. r=trivial

The commit looks large, but it's trivial: just replacing $(android_res_files) with $(all_resources) in

+geckoview_resources.zip: $(all_resources) $(GLOBAL_DEPS)

It looks bigger because it needs to move below the definition of $(all_resources).