[Android] Add bug# to v14 resource generation script comment.

BUG=NONE

Review URL: https://codereview.chromium.org/1022423003

Cr-Original-Commit-Position: refs/heads/master@{#321842}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 1ababd1323d0762c3bc9c521b9f7d994601699a5

android/gyp/generate_v14_compatible_resources.py

@@ -11,7 +11,7 @@ so we are generating another set of resources by this script.
 
 1. paddingStart attribute can cause a crash on Galaxy Tab 2.
 2. There is a bug that paddingStart does not override paddingLeft on
-   JB-MR1. This is fixed on JB-MR2.
+   JB-MR1. This is fixed on JB-MR2. b/8654490
 
 Therefore, this resource generation script can be removed when
 we drop the support for JB-MR1.