staging/android: prepare sw_sync files for de-staging

remove file paths in the comments and add short description about each
file.

v2: remove file paths instead of just change them.

v3: improve header description as sugggested by Eric

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/android/sync_debug.h b/drivers/staging/android/sync_debug.h
index fab6639..d269aa6 100644
--- a/drivers/staging/android/sync_debug.h
+++ b/drivers/staging/android/sync_debug.h
@@ -1,5 +1,5 @@
 /*
- * include/linux/sync.h
+ * Sync File validation framework and debug infomation
  *
  * Copyright (C) 2012 Google, Inc.
  *