use dlmalloc

Change-Id: I6c0bd3fb48092898be6aa2ef295001b813f8d1a7
update custombootimg

Change-Id: If4fecd83d92639dc81c5889dc44d6121f0d3e512
Merge branch 'cm-12.0' of ssh://review.cas-online.nl:29418/android-legacy/android_device_sony_msm8226-common into cm-12.0