syz-fuzzer: tell manager we are not dead while fetching corpus
syz-fuzzer: tell manager we are not dead while fetching corpus

Initial fetch of corpus caused "no output" in qemu emulation.
Tell manager we are not dead while fetching.

xairy/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,xairy/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller