se_compat_cil: Prepend generated files with a header

to ensure the file size is greater than 0, as secilc cannot handle
zero-sized cil files.

Fixes: 185256986
Bug: 183362912
Test: Forrest re-run broken test
Change-Id: Ief3039d38728fbeff67c6e39d6b15bddb006e5f8
1 file changed