Infrastructure: add include search paths (-I, etc.).
diff --git a/Test/runtests b/Test/runtests
index c3a049b..945a0f3 100755
--- a/Test/runtests
+++ b/Test/runtests
@@ -116,6 +116,8 @@
diff -b $BASEDIR/hlsl.includeNegative.vert.out $TARGETDIR/hlsl.includeNegative.vert.out || HASERROR=1
$EXE -l -i include.vert > $TARGETDIR/include.vert.out
diff -b $BASEDIR/include.vert.out $TARGETDIR/include.vert.out || HASERROR=1
+$EXE -D -e main -H -Iinc1/path1 -Iinc1/path2 hlsl.dashI.vert > $TARGETDIR/hlsl.dashI.vert.out
+diff -b $BASEDIR/hlsl.dashI.vert.out $TARGETDIR/hlsl.dashI.vert.out || HASERROR=1
#
# Final checking