Remove '-u' option from run-test-conf.sh

This causes a failure when evaluating $OSTYPE on systems which do not
set that variable (everything but Msys/MinGW)
Signed-off-by: Keith Packard <keithp@keithp.com>

test/run-test-conf.sh

@@ -21,7 +21,7 @@
 # DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 # TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 # PERFORMANCE OF THIS SOFTWARE.
-set -eu
+set -e
 
 case "$OSTYPE" in
     msys ) MyPWD=`pwd -W` ;;  # On Msys/MinGW, returns a MS Windows style path.