How can I use multiple -S values with aapt without using <add-resource>?
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I am trying to build R.java by using aapt from the command line. I am specifying multiple `-S` directories because I have multiple `res` directories. I am building by using:

    aapt package \
      -M AndroidManifest.xml \
      -m -J gen \
      -S src/com/example/res \
      -S src/com/example/ui/res

Unfortunately, I am getting the following error:

    src/com/example/ui/res/values/strings.xml:2: error: Resource at app1_name appears in overlay but not in the base package; use <add-resource> to add.

Currently, `src/com/example/ui/res/values/strings.xml` contains the following:

    <resources>
        <string name="app1_name">MyAppName</string>
    </resources>

I would prefer not to have to change this to:

    <resources>
        <add-resource type="string" name="app1_name">MyAppName</add-resource>
    </resources>

(This was suggested on https://groups.google.com/forum/?fromgroups#!topic/android-porting/bYfeLEjERjg, though it does not even seem to solve my problem.)

Am I misguided in my expectation of how the `-S` argument should work?

The only workaround I can think of is to symlink all of my `-S` directories as subdirectories of the root `res` directory and to specify `res` as the only `-S` directory.
