libion: Add clang-format upload hook am: bf79e963ca am: 162b6541cd am: 94e7294227 am: 96b41ef279 am: be9beb1f27

Original change: https://android-review.googlesource.com/c/platform/system/memory/libion/+/2154433

Change-Id: I8357994df5999c887b3c346bacfa2afc120aae8f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
new file mode 100644
index 0000000..c8dbf77
--- /dev/null
+++ b/PREUPLOAD.cfg
@@ -0,0 +1,5 @@
+[Builtin Hooks]
+clang_format = true
+
+[Builtin Hooks Options]
+clang_format = --commit ${PREUPLOAD_COMMIT} --style file --extensions c,h,cc,cpp