Enable zram swap

It fixes a kernel panic on DB845c and RB5 while running
AOSP/external/stressapptest due to "System is deadlocked
on memory".

It also fixes a similar crash reported on RB5 while running CtsBionicTestCases, https://bugs.linaro.org/show_bug.cgi?id=6036,
while we are still diagnosing that crash for a proper fix.

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Change-Id: I81af210a50526050c00b65f55e85cf360fc39622
4 files changed