[Android] Fix null-build broken by https://codereview.chromium.org/14322004/

build/android/strip_native_libraries.gypi

Index: build/android/strip_native_libraries.gypi
diff --git a/build/android/strip_native_libraries.gypi b/build/android/strip_native_libraries.gypi
index bcf282f9e102f3afcf1ef4bcfecb67a778382bb5..55f68265ced28c6922e4473cefc6f9a80c95ab16 100644
--- a/build/android/strip_native_libraries.gypi
+++ b/build/android/strip_native_libraries.gypi
@@ -9,6 +9,7 @@
 #  {
 #    'actions': [
 #      'variables': {
+#        'intermediate_dir': 'location to place intermediate build artifcats'
 #        'ordered_libraries_file': 'file generated by write_ordered_libraries'
 #        'strip_stamp': 'file to touch when the action is complete'
 #        'stripped_libraries_dir': 'directory to store stripped libraries',
@@ -26,12 +27,24 @@
     '<(DEPTH)/build/android/gyp/strip_library_for_device.py',
     '<(ordered_libraries_file)'
   ],
+  'variables': {
+    'strip_output_paths': [],
+    'conditions': [
+      ['component == "shared_library"', {
+        # Add a fake output to force the build to always re-run this step.  This
+        # is required because the real inputs are not known at gyp-time and
+        # changing base.so may not trigger changes to dependent libraries.
+        'variables': {
+          'strip_output_paths': [
+            '<(intermediate_dir)/<(strip_stamp).fake',
+          ],
+        },
+      }],
+    ],
+  },
   'outputs': [
     '<(strip_stamp)',
-    # Add a fake output to force the build to always re-run this step. This
-    # is required because the real inputs are not known at gyp-time and
-    # changing base.so may not trigger changes to dependent libraries.
-    '<(strip_stamp).fake',
+    '<@(strip_output_paths)',
   ],
   'action': [
     'python', '<(DEPTH)/build/android/gyp/strip_library_for_device.py',