run-test --gdb on host should imply dev mode.

Making consistent with the target.

Change-Id: Iba30db648f598d3996675287fc9d404b3aa80b0d
diff --git a/test/etc/host-run-test-jar b/test/etc/host-run-test-jar
index 7e76c17..c130521 100755
--- a/test/etc/host-run-test-jar
+++ b/test/etc/host-run-test-jar
@@ -31,6 +31,7 @@
         shift
     elif [ "x$1" = "x--gdb" ]; then
         GDB="y"
+        DEV_MODE="y"
         shift
     elif [ "x$1" = "x--invoke-with" ]; then
         shift