Add switch for turning on library in zip file support.

Note this patch doesn't enable the support (that is done in GYP).

BUG=

Review URL: https://codereview.chromium.org/359323002

git-svn-id: http://src.chromium.org/svn/trunk/src/build@280812 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

android/tests/multiple_proguards/src/dummy/NativeLibraries.java

@@ -10,6 +10,7 @@ package org.chromium.base.library_loader;
  */
 public class NativeLibraries {
     public static boolean USE_LINKER = false;
+    public static boolean USE_LIBRARY_IN_ZIP_FILE = false;
     public static boolean ENABLE_LINKER_TESTS = false;
     static final String[] LIBRARIES = {};
     static String VERSION_NUMBER = "";