Allow zip64 support when opening zip files

When opening an zip file through zipfile.ZipFile(), python2 by default
disables zip64 support. To support update files >4GB, we manually add
allowZip64 to override the setting.

Test: generate && serve an OTA

Change-Id: I9645e963ced830cc2d3a4b72bc63b9369a1cefe8
diff --git a/tools/releasetools/check_target_files_vintf.py b/tools/releasetools/check_target_files_vintf.py
index 0edefac..3c2406c 100755
--- a/tools/releasetools/check_target_files_vintf.py
+++ b/tools/releasetools/check_target_files_vintf.py
@@ -252,7 +252,7 @@
     if os.path.isdir(target_files):
       return os.path.isdir(os.path.join(target_files, "VENDOR"))
     if zipfile.is_zipfile(target_files):
-      return HasPartition(zipfile.ZipFile(target_files), "vendor")
+      return HasPartition(zipfile.ZipFile(target_files, allowZip64=True), "vendor")
     raise ValueError("Unknown target_files argument")
 
   return (HasVendorPartition(target_files) and