buildbot: Include dx-tests

Test: manual invocation
Bug: b/36048561
Change-Id: Ia5e9a7dbc2a329fce68f555fc6b228da89b3f2ea
diff --git a/tools/buildbot-build.sh b/tools/buildbot-build.sh
index bf7692a..75694c3 100755
--- a/tools/buildbot-build.sh
+++ b/tools/buildbot-build.sh
@@ -68,7 +68,7 @@
 fi
 
 if [[ $mode == "host" ]]; then
-  make_command="make $j_arg $showcommands build-art-host-tests $common_targets"
+  make_command="make $j_arg $showcommands build-art-host-tests $common_targets dx-tests"
   make_command+=" ${out_dir}/host/linux-x86/lib/libjavacoretests.so "
   make_command+=" ${out_dir}/host/linux-x86/lib64/libjavacoretests.so"
 elif [[ $mode == "target" ]]; then