manager: ignore .git dir in corpus
manager: ignore .git dir in corpus

For the case the corpus is checked into git.

hyz0906/syzkaller,google/syzkaller,xairy/syzkaller,zoulasc/syzkaller,xairy/syzkaller,dotweiba/syzkaller,sploving/syzkaller,zoulasc/syzkaller,google/syzkaller,sploving/syzkaller,hyz0906/syzkaller,google/syzkaller,xairy/syzkaller,xairy/syzkaller,hyz0906/syzkaller,dotweiba/syzkaller,dotweiba/syzkaller,hyz0906/syzkaller,dotweiba/syzkaller,xairy/syzkaller,google/syzkaller,zoulasc/syzkaller,xairy/syzkaller,hyz0906/syzkaller,sploving/syzkaller,google/syzkaller,sploving/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller,zoulasc/syzkaller