Remove semicolons after namespace declarations

Semicolons aren't needed after namespace declarations, and their
presence causes compiler errors with current clang master.

Change-Id: Id770c19b59bba461073dd579319f5900e59c5eef
Signed-off-by: Bernhard Rosenkränzer <Bernhard.Rosenkranzer@linaro.org>
diff --git a/Android.bp b/Android.bp
index 032a61a..0f91348 100644
--- a/Android.bp
+++ b/Android.bp
@@ -17,6 +17,7 @@
     cflags: [
         "-Wall",
         "-Werror",
+        "-Wextra-semi",
     ],
 }