t1300: Add tests for git-config --bool --get
t1300: Add tests for git-config --bool --get

Noticed that there were only tests for --int, but not
for --bool. Add some.

Signed-off-by: Frank Lichtenheld <86a8c2da8527a1c6978bdca6d7986fe14ae147fe@lichtenheld.de>
Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

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