Roll src/third_party/cros_system_api/ 557c37af3..0e2a5fd43 (3 commits)

https://chromium.googlesource.com/chromiumos/platform/system_api.git/+log/557c37af39f5..0e2a5fd43dc3

$ git log 557c37af3..0e2a5fd43 --date=short --no-merges --format='%ad %ae %s'
2018-06-19 timloh Add a files argument to vm_tools.cicerone.LaunchContainerApplicationRequest
2018-06-18 benchan shill: remove deprecated kHostNameProperty
2018-06-18 jkardatzke Removed unused protobufs/constants for concierge

Created with:
  roll-dep src/third_party/cros_system_api

Bug: 822513
Change-Id: Ia857d7d8836ea91b71634c4fa42092be57e9fa19
Reviewed-on: https://chromium-review.googlesource.com/1109316Reviewed-by: Nicholas Verne <nverne@chromium.org>
Commit-Queue: Timothy Loh <timloh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569154}

DEPS

@@ -533,7 +533,7 @@ deps = {
 
   # For Linux and Chromium OS.
   'src/third_party/cros_system_api': {
-      'url': Var('chromium_git') + '/chromiumos/platform/system_api.git' + '@' + '557c37af39f5195d80aaad53c3a06b5ec804da95',
+      'url': Var('chromium_git') + '/chromiumos/platform/system_api.git' + '@' + '0e2a5fd43dc395b3fd526c8f726911871597dd82',
       'condition': 'checkout_linux',
   },