Roll src/third_party/cros_system_api/ 6d8535d43..a2a458bd5 (2 commits)

https://chromium.googlesource.com/chromiumos/platform/system_api.git/+log/6d8535d43743..a2a458bd5d69

$ git log 6d8535d43..a2a458bd5 --date=short --no-merges --format='%ad %ae %s'
2018-07-26 qiyuh bluetooth: Add kStackSyncQuitting as bluetooth adapter property
2018-07-27 amoylan Rename to org.chromium.MachineLearning

Created with:
  roll-dep src/third_party/cros_system_api

R=derat@chromium.org

Change-Id: I2fcb56b27c664d5ad7e1d0cd149cf4962e4f6656
Reviewed-on: https://chromium-review.googlesource.com/1160829Reviewed-by: Dan Erat <derat@chromium.org>
Commit-Queue: Andrew Moylan <amoylan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#580412}

DEPS

@@ -567,7 +567,7 @@ deps = {
 
   # For Linux and Chromium OS.
   'src/third_party/cros_system_api': {
-      'url': Var('chromium_git') + '/chromiumos/platform/system_api.git' + '@' + '6d8535d43743a52430b276b3013c5ed12e573a78',
+      'url': Var('chromium_git') + '/chromiumos/platform/system_api.git' + '@' + 'a2a458bd5d690a1b7bba24d73650b19f3b9549d1',
       'condition': 'checkout_linux',
   },