make: Use `printf` instead of `echo -e`

`echo`'s `-e` option isn't always supported, notably on the android
build servers. They do support `printf`, which also handles escapes.

Bug: 254348825
Change-Id: Iad3039cace616e4c5e70d4f4559a03e2145d575a
1 file changed
tree: f8ea0fae40846aa9767f7c735b3a76b36f866825
  1. project/
  2. .clang-format
  3. LICENSE
  4. PREUPLOAD.cfg