Increased audio loudness (from Skywalker) (rev 2)
Added filesystem dynamic read-ahead
Thanks to Chad Gooldman
Optimized SLUB memory allocator
lowmemorykiller: Imported the new LMK from 3.4 kernel credits: Christopher83
lowmemorykiller: Change default debug_level to 1

The select...to kill messages are not very useful when not debugging
the lowmemorykiller itself. After the change to check TIF_MEMDIE
instead of using a task notifer this message can also get very
noisy.

Change-Id: Ice171c25801d6faa454b885a23b24b002423b754
Signed-off-by: Arve Hjønnevåg <arve@android.com>
lowmemorykiller: Voku and Dorimanx tweaks for LMK