wpr_go: support armv7l and aarch64

telemetry/bin/update_wpr_go_binary

Index: telemetry/bin/update_wpr_go_binary
diff --git a/telemetry/bin/update_wpr_go_binary b/telemetry/bin/update_wpr_go_binary
index b36aa9083c977a57055b4eb70031fc334a9cefd8..48514b9a38925ef663d474b0e34cc83cdb8d02be 100755
--- a/telemetry/bin/update_wpr_go_binary
+++ b/telemetry/bin/update_wpr_go_binary
@@ -45,6 +45,12 @@ def build_wpr_go(os_name, os_arch):
   if os_arch == 'x86':
     os_arch = '386'
 
+  if os_arch == 'armv7l':
+    os_arch = 'arm'
+
+  if os_arch == 'aarch64':
+    os_arch = 'arm64'
+
   # go build command recognizes 'darwin' but not 'mac'.
   if os_name == 'mac':
     os_name = 'darwin'
@@ -73,6 +79,8 @@ _SUPPORTED_PLATFORMS = (
   ('mac', 'x86_64'),
   ('linux', 'x86_64'),
   ('win', 'AMD64'),
+  ('linux', 'armv7l'),
+  ('linux', 'aarch64'),
 )