Update archive script to also archive maven packaging.

Bug: 67090422
R=ricow@google.com

Change-Id: I37389a657ed9f87770edac6b6c42d1b70bb24541
diff --git a/tools/utils.py b/tools/utils.py
index 7d198fa..40a62b8 100644
--- a/tools/utils.py
+++ b/tools/utils.py
@@ -19,6 +19,7 @@
     'dexsegments.jar')
 DEX_SEGMENTS_RESULT_PATTERN = re.compile('- ([^:]+): ([0-9]+)')
 LIBS = os.path.join(REPO_ROOT, 'build', 'libs')
+MAVEN_ZIP = os.path.join(LIBS, 'r8.zip')
 
 D8 = 'd8'
 R8 = 'r8'