Increased the size of buildTag in xip header by another 4Bytes
Increased the size of buildTag in xip header by another 4Bytes

RTC:170829
Change-Id: I82b6a6fbe0816ab3cf205aa4e7b5dfe1fda2c8bb
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/38195
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Reviewed-by: Shakeeb A. Pasha B K <5990c9513e2a0d55088e1d9d279da9933204e66f@in.ibm.com>
Tested-by: PPE CI <dc75934ba5befb9221434e67a247b93aec46b36b@us.ibm.com>
Tested-by: Hostboot CI <52521565bd8ea18a2b112942dce4f4220a97c2c8@us.ibm.com>
Reviewed-by: Sachin Gupta <285b19a698aa558fba6ab25cf25b393d072fd749@in.ibm.com>
Reviewed-by: Martin Peschke <4c516a35580133f593dfe866810ac6bfbd5b0dba@de.ibm.com>

open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot