adjust custombootimg

Change-Id: I8f561d3793adea7fb780e0a7b2d0cbcbbe72e4ce
Merge branch 'android-5.0' of ssh://review.cas-online.nl:29418/android-legacy/android_device_sony_msm8226-common into android-5.0

Conflicts:
	boot/custombootimg.mk

Change-Id: I8ce24d73434acca7a903cc0e0f2eefd3fb67fdf8