This commit changes below to speed up package build: a. pass '-j[jobs number]' argument to dpkg-build* b. mount all short term contents on tmpfs for builder c. Add configure line to use 'eatmydata' Story: 2008846 Task: 44154 Signed-off-by: hbai <haiqing.bai@windriver.com> Change-Id: If43e0dad26505b9f8a109c762b328b0b89d3b6a7