Add multi-architecture support in telemetry.

tools/telemetry/telemetry/core/platform/__init__.py

Index: tools/telemetry/telemetry/core/platform/__init__.py
diff --git a/tools/telemetry/telemetry/core/platform/__init__.py b/tools/telemetry/telemetry/core/platform/__init__.py
index d18323a30133ae67745c8c9912915dbe187403ef..3622b607600bb0402e4400187838e8a0f52dd873 100644
--- a/tools/telemetry/telemetry/core/platform/__init__.py
+++ b/tools/telemetry/telemetry/core/platform/__init__.py
@@ -153,6 +153,12 @@ class Platform(object):
     """Returns True if the device has been thermally throttled."""
     return self._platform_backend.HasBeenThermallyThrottled()
 
+  def GetArchName(self):
+    """Returns a string description of the Platform architecture.
+
+    Examples: x86_64 (posix), AMD64 (win), armeabi-v7a, x86"""
+    return self._platform_backend.GetArchName()
+
   def GetOSName(self):
     """Returns a string description of the Platform OS.