Remove <(library) usage from gyp files.

BUG=chromium:111541

Patch by Thiago Farina <tfarina@chromium.org>.
Original code review: https://breakpad.appspot.com/513002/
Review URL: https://breakpad.appspot.com/515002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1101 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/client/windows/unittests/testing.gyp

@@ -36,7 +36,7 @@
   'targets': [
     {
       'target_name': 'gtest',
-      'type': '<(library)',
+      'type': 'static_library',
       'include_dirs': [
         '<(DEPTH)/testing/include',
         '<(DEPTH)/testing/gtest',
@@ -54,7 +54,7 @@
     },
     {
       'target_name': 'gmock',
-      'type': '<(library)',
+      'type': 'static_library',
       'include_dirs': [
         '<(DEPTH)/testing/include',
         '<(DEPTH)/testing/',