Set gememalloc as built-in
Seems necessary to avoid an intermittant hang during boot.
Stock kernel also seems to do this, despite it being specified
as a module via the source defconfig.

Commit: https://github.com/androidarmv6/android_kernel_samsung_bcm21553-common/commit/d61a2f5b5630a714354b319691f20a36ee0d181e
cgroupfs: create /sys/fs/cgroup to mount cgroupfs on
We really shouldn't be asking userspace to create new root filesystems.
So follow along with all of the other in-kernel filesystems, and provide
a mount point in sysfs.

For cgroupfs, this should be in /sys/fs/cgroup/  This change provides
that mount point when the cgroup filesystem is registered in the kernel.

Commit: https://github.com/androidarmv6/android_kernel_samsung_bcm21553-common/commit/3877ae5bcea2bcb7f11a1555714bb15f6a109819