libmemtrack: Add clang-format upload hook

Check code formatting on upload.

Bug: N/A
Test: repo upload
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
Change-Id: I7c849655539ac60e48cf2b4c25b33a1d222a6cfe
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