Force use of bash for tests - 15 fail without it.

Index: test/Makefile
--- test/Makefile.orig
+++ test/Makefile
@@ -17,7 +17,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see http://www.gnu.org/licenses/ .
 
-SHELL_PATH ?= $(SHELL)
+SHELL_PATH ?= ${LOCALBASE}/bin/bash
 SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
 RM ?= rm -f
 PROVE ?= prove