scripts: snapshot of kernel build utility scripts

This is a snapshot of build scripts taken as of msm-4.19
commit <3fc21416733e696> (Merge "ARM: dts: msm: Add dpdm
regulator on kona").

Change-Id: I3a60f8563227de4e6f59d5abcca7c8edd2c8c12f
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>