Make bitmaptools executable after downloading it from cloud storage.

tools/telemetry/telemetry/util/support_binaries.py

Index: tools/telemetry/telemetry/util/support_binaries.py
diff --git a/tools/telemetry/telemetry/util/support_binaries.py b/tools/telemetry/telemetry/util/support_binaries.py
index ebc19174224b9a85eceacde92f1948527775355f..3e8c2bca3833845a3b58167924248b31d1047029 100644
--- a/tools/telemetry/telemetry/util/support_binaries.py
+++ b/tools/telemetry/telemetry/util/support_binaries.py
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import os
+import stat
 
 from telemetry import decorators
 from telemetry.util import cloud_storage
@@ -48,6 +49,11 @@ def FindPath(binary_name, platform_name):
     cloud_storage.GetIfChanged(_GetBinPath(binary_name, platform_name))
     command = _GetBinPath(binary_name, platform_name)
 
+    # Ensure the downloaded file is actually executable.
+    if command and os.path.exists(command):
+      os.chmod(command,
+               stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR | stat.S_IRGRP)
+
   # Return an absolute path consistently.
   if command:
     command = os.path.abspath(command)