Add test jar generation logic for ant builds.

base/base.gyp

Index: base/base.gyp
diff --git a/base/base.gyp b/base/base.gyp
index 643836c65365ea765f2130067b6e5935d058a411..353cbd4a64aacb040615af0f91308b45037d8fea 100644
--- a/base/base.gyp
+++ b/base/base.gyp
@@ -926,6 +926,39 @@
     ['OS == "android"', {
       'targets': [
         {
+          # Target for creating common output build directories.

[Yaron, 2012/09/07 19:19:31]

Seems like this may as well be in a build/ .gyp file since it's about the build
and not the base library.

[shashi, 2012/09/07 23:31:31]

Done.

+          # Creating output dirs beforehand ensures that build
+          # scripts can assume these folders to exist and there
+          # are no race conditions resulting from build scripts
+          # trying to create these directories.
+          # The build/java.gypi target depends on this target.
+          'target_name': 'build_output_directories',
+          'type': 'none',
+          'actions': [
+            {
+              'action_name': 'create_output_dirs',

[cjhopman, 2012/09/07 19:50:35]

Maybe rename this to create_java_output_dirs.

[shashi, 2012/09/07 23:31:31]

Done.

+              'variables' : {
+                'output_dirs' : [
+                  '<(PRODUCT_DIR)/apks',
+                  '<(PRODUCT_DIR)/lib.java',
+                  '<(PRODUCT_DIR)/test.lib.java',
+                 ]
+              },
+              'inputs' : [
+                '<(PRODUCT_DIR)'
+              ],
+              'outputs': [
+                '<@(output_dirs)'
+              ],
+              'action': [
+                'mkdir',
+                '-p',
+                '<@(output_dirs)',
+              ],
+            },
+          ],
+        },
+        {
           'target_name': 'base_jni_headers',
           'type': 'none',
           'sources': [