Fix testConsistentHostPlatformInfo on cros

telemetry/telemetry/core/cros_interface.py

Index: telemetry/telemetry/core/cros_interface.py
diff --git a/telemetry/telemetry/core/cros_interface.py b/telemetry/telemetry/core/cros_interface.py
index bf98d3f7a4c18ffb32836f39fed7cede227a3a39..1921207d3c9f9e829a5576b115cc6e82b44375a3 100644
--- a/telemetry/telemetry/core/cros_interface.py
+++ b/telemetry/telemetry/core/cros_interface.py
@@ -524,7 +524,7 @@ class CrOSInterface(object):
     return False
 
   def GetArchName(self):
-    return self.RunCmdOnDevice(['uname', '-m'])[0]
+    return self.RunCmdOnDevice(['uname', '-m'])[0].rstrip()
 
   def IsRunningOnVM(self):
     return self.RunCmdOnDevice(['crossystem', 'inside_vm'])[0] != '0'