t3302: do not chdir around in the primary test process
t3302: do not chdir around in the primary test process

These days^Wyears we strive to do stuff in subdirectories inside
subshells to avoid mistakes.

Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git