Change CIPD entry for proguard to install_mode: copy

This fixes java_deobfuscate.py not working when run under swarming.

Bug: 995290
Change-Id: I29a30852f7d5e0f0039b61707dc5995edd076d09
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2107063
Auto-Submit: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Sam Maier <smaier@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#751461}

DEPS

@@ -1239,7 +1239,7 @@ deps = {
       'packages': [
           {
               'package': 'chromium/third_party/proguard',
-              'version': '3bd778c422ea5496de2ef25c007a517dbb5ce5ca',
+              'version': 'Fd91BJFVlmiO6c46YMTsdy7n2f5Sk2hVVGlzPLvqZPsC',
           },
       ],
       'condition': 'checkout_android',

third_party/proguard/cipd.yaml

@@ -8,3 +8,5 @@ package: chromium/third_party/proguard
 data:
   - file: lib/proguard603.jar
   - file: lib/retrace603.jar
+# Run on swarming, so symlinks don't work.
+install_mode: copy