Disable LoadAndLaunchAppChromeNotRunning for Linux Aura

The PlatformAppLoadAndLaunchBrowserTest.LoadAndLaunchAppChromeNotRunning
test hangs on Linux Aura 7 times out of 10 in the revision range 236425:236499.

For details, see
http://build.chromium.org/p/chromium.linux/builders/Linux%20Aura/builds/11485
http://build.chromium.org/p/chromium.linux/builders/Linux%20Aura/builds/11487
http://build.chromium.org/p/chromium.linux/builders/Linux%20Aura/builds/11488
http://build.chromium.org/p/chromium.linux/builders/Linux%20Aura/builds/11489
http://build.chromium.org/p/chromium.linux/builders/Linux%20Aura/builds/11490
http://build.chromium.org/p/chromium.linux/builders/Linux%20Aura/builds/11492

NOTRY=True
BUG=176897
TEST=local compile
TBR=benwells@chromium.org

Review URL: https://codereview.chromium.org/78393004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236527 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236527