rename git-p4 tests

Use consistent naming for all tests: "t98<num>-git-p4-<topic>.sh"

Signed-off-by: Pete Wyckoff <pw@padd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t9800-git-p4.sh b/t/t9800-git-p4-basic.sh
similarity index 100%
rename from t/t9800-git-p4.sh
rename to t/t9800-git-p4-basic.sh

diff --git a/t/t9803-git-shell-metachars.sh b/t/t9803-git-p4-shell-metachars.sh
similarity index 100%
rename from t/t9803-git-shell-metachars.sh
rename to t/t9803-git-p4-shell-metachars.sh

diff --git a/t/t9805-skip-submit-edit.sh b/t/t9805-git-p4-skip-submit-edit.sh
similarity index 100%
rename from t/t9805-skip-submit-edit.sh
rename to t/t9805-git-p4-skip-submit-edit.sh

diff --git a/t/t9807-submit.sh b/t/t9807-git-p4-submit.sh
similarity index 100%
rename from t/t9807-submit.sh
rename to t/t9807-git-p4-submit.sh

diff --git a/t/t9808-chdir.sh b/t/t9808-git-p4-chdir.sh
similarity index 100%
rename from t/t9808-chdir.sh
rename to t/t9808-git-p4-chdir.sh