trace: Add a new readonly entry to report total buffer size
trace: Add a new readonly entry to report total buffer size

The current file "buffer_size_kb" reports the size of per-cpu buffer and
not the overall memory allocated which could be misleading. A new file
"buffer_total_size_kb" adds up all the enabled CPU buffer sizes and
reports it. This is only a readonly entry.

Signed-off-by: Vaibhav Nagarnaik <1fa667586c90bce718fd3c486c1144f98789d483@google.com>
Cc: Michael Rubin <4fde2c96bbb2b79984d097dee9168089855814c5@google.com>
Cc: David Sharp <d17c0a8430b0bd65a7a6ae309f7a3dc190d92668@google.com>
Link: http://lkml.kernel.org/r/1313531179-9323-2-git-send-email-1fa667586c90bce718fd3c486c1144f98789d483@google.com
Signed-off-by: Steven Rostedt <43232e92d70cc7aa53504ad0397085ee47bad87f@goodmis.org>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs