app: aboot: Fix compilation error for APQ8009

Move header_version inside OSVERSION_IN_BOOTIMAGE to fix compilation
error for APQ8009.

Change-Id: I555cc04ba1c7ca5aecac3897957e7ac2b852ee6f
Signed-off-by: Nagireddy Annem <nannem@codeaurora.org>
1 file changed