Bug 1370535 - Install the geckodriver binary in artifact builds when available. r=froydnj

MozReview-Commit-ID: 6NnbomedmRy

--HG--
extra : rebase_source : 7844f39cc16797fa60c6d03d35625373e5862875

python/mozbuild/mozbuild/artifacts.py

@@ -131,6 +131,7 @@ class ArtifactJob(object):
         ('bin/OCSPStaplingServer', ('bin', 'bin')),
         ('bin/certutil', ('bin', 'bin')),
         ('bin/fileid', ('bin', 'bin')),
+        ('bin/geckodriver', ('bin', 'bin')),
         ('bin/pk12util', ('bin', 'bin')),
         ('bin/screentopng', ('bin', 'bin')),
         ('bin/ssltunnel', ('bin', 'bin')),
@@ -435,6 +436,7 @@ class WinArtifactJob(ArtifactJob):
         ('bin/OCSPStaplingServer.exe', ('bin', 'bin')),
         ('bin/certutil.exe', ('bin', 'bin')),
         ('bin/fileid.exe', ('bin', 'bin')),
+        ('bin/geckodriver.exe', ('bin', 'bin')),
         ('bin/pk12util.exe', ('bin', 'bin')),
         ('bin/screenshot.exe', ('bin', 'bin')),
         ('bin/ssltunnel.exe', ('bin', 'bin')),