This method will switch minSDKVersion of RecyclerLibrary on compile time for version 13

Switching

 applicationVariants.all{ variant ->
        // This is a terrible hacky way of compile-time changing all the libraries
        // minSDKs to  SDK 13. This script has to be mantained everytime you update
        // any of these libraries or the plugin updates.
        variant.processManifest.doFirst {
            File manifestFile = file("${buildDir}/intermediates/exploded-aar/com.android.support/recyclerview-v7/21.0.0-rc1/AndroidManifest.xml")
            if (manifestFile.exists()) {
                println("Replacing minSdkVersion of RecyclerView-V7 library")
                String content = manifestFile.getText('UTF-8')
                content = content.replaceAll(/minSdkVersion="L"/, 'minSdkVersion=\"13\"')
                manifestFile.write(content, 'UTF-8')
            }
        }
    }