Bug 1563053 - Put all Android PGO outputs in a separate directory; r=firefox-build-system-reviewers,chmanchester

If we end up generating multiple profraw files in the future, it will
help to have them all in a separate directory so that we can just 'adb
pull' the whole directory at once.

Depends on D36839

Differential Revision: https://phabricator.services.mozilla.com/D36840

--HG--
extra : moz-landing-system : lando

testing/mozharness/configs/android/android_pgo.py

@@ -13,5 +13,5 @@ config = {
         'install',
         'run-tests',
     ],
-    "output_directory": "/sdcard",
+    "output_directory": "/sdcard/pgo_profile",
 }

testing/mozharness/scripts/android_emulator_pgo.py

@@ -201,7 +201,7 @@ class AndroidProfileRun(TestingMixin, BaseScript, MozbaseMixin,
         # bool pref.
         prefs["browser.tabs.remote.autostart"] = False
 
-        outputdir = self.config.get('output_directory', '/sdcard')
+        outputdir = self.config.get('output_directory', '/sdcard/pgo_profile')
         jarlog = posixpath.join(outputdir, 'en-US.log')
         profdata = posixpath.join(outputdir, 'default.profraw')
 
@@ -213,6 +213,7 @@ class AndroidProfileRun(TestingMixin, BaseScript, MozbaseMixin,
 
         adbdevice = ADBDevice(adb=adb,
                               device='emulator-5554')
+        adbdevice.mkdir(outputdir)
 
         try:
             # Run Fennec a first time to initialize its profile