git: add ama/amc and improve lg speed
git: add ama/amc and improve lg speed

Add "am --abort/--continue"

Remove --graph that reduce git response time and doesn't matter on
watching single branch

Signed-off-by: Tinghan Shen <c9ff063c8de5b2a8e3ffacf80169ee51e722b470@mediatek.com>

tfing/config