git-remote-testgit: build it to run under $SHELL_PATH

Just like all the other shell scripts, replace the shebang line to
make sure it runs under the shell the user specified.

As this no longer depends on bashisms, t5801 does not have to say
bash must be available somewhere on the system.
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

.gitignore

@@ -125,6 +125,7 @@
 /git-remote-ftps
 /git-remote-fd
 /git-remote-ext
+/git-remote-testgit
 /git-remote-testpy
 /git-remote-testsvn
 /git-repack

Makefile

@@ -460,6 +460,7 @@ SCRIPT_SH += git-mergetool.sh
 SCRIPT_SH += git-pull.sh
 SCRIPT_SH += git-quiltimport.sh
 SCRIPT_SH += git-rebase.sh
+SCRIPT_SH += git-remote-testgit.sh
 SCRIPT_SH += git-repack.sh
 SCRIPT_SH += git-request-pull.sh
 SCRIPT_SH += git-stash.sh

t/t5801-remote-helpers.sh

@@ -7,11 +7,6 @@ test_description='Test remote-helper import and export commands'
 
 . ./test-lib.sh
 
-if ! type "${BASH-bash}" >/dev/null 2>&1; then
-	skip_all='skipping remote-testgit tests, bash not available'
-	test_done
-fi
-
 compare_refs() {
 	git --git-dir="$1/.git" rev-parse --verify $2 >expect &&
 	git --git-dir="$3/.git" rev-parse --verify $4 >actual &&