Update git submodules
* Update prebuilts/build-tools from branch 'master'
to 9867042b2ca10d3e718ad60927efe9af25b8f994
- Add m4 to the prebuilt build-tools
Bug: 117561006
Test: OUT_DIR=out DIST_DIR=dist prebuilts/build-tools/build-prebuilts.sh
Change-Id: Ic44d3640e9bbdc776a93dd2f44a767b082bc7c21
diff --git a/prebuilts/build-tools b/prebuilts/build-tools
index 0a35eb9..9867042 160000
--- a/prebuilts/build-tools
+++ b/prebuilts/build-tools
@@ -1 +1 @@
-Subproject commit 0a35eb93833e4003197be7f01d36b7deed225e4b
+Subproject commit 9867042b2ca10d3e718ad60927efe9af25b8f994