Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/73e352e..bf6af18

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/2c59f67..a227198

TBR=machenbach@chromium.org,hablich@chromium.org,sergiyb@chromium.org

Change-Id: I561d492911e3528b7fdf19fc24efa671eaa1245c
Reviewed-on: https://chromium-review.googlesource.com/1009283
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52553}

DEPS

@@ -12,7 +12,7 @@ vars = {
 
 deps = {
   'v8/build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + '73e352e758d90603e23bdc84734c12aa5817ab5f',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'bf6af18d01d08a090443cbb71a2a1e2a7e270284',
   'v8/tools/gyp':
     Var('chromium_url') + '/external/gyp.git' + '@' + 'd61a9397e668fa9843c4aa7da9e79460fe590bfb',
   'v8/third_party/icu':
@@ -32,7 +32,7 @@ deps = {
     'condition': 'checkout_android',
   },
   'v8/third_party/catapult': {
-    'url': Var('chromium_url') + '/catapult.git' + '@' + '2c59f678c7ede8a844fb687525d594b71aabe3dd',
+    'url': Var('chromium_url') + '/catapult.git' + '@' + 'a2271985335430f09da172cd3589e27702f6eff1',
     'condition': 'checkout_android',
   },
   'v8/third_party/colorama/src': {