build: add newly introduced header to fix make dist
build: add newly introduced header to fix make dist

Missing bit of 4bb6eff3dbd50d8fef7d6bdbed55c5aaa70036a8

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 1674cf28f1f5b71bd25a1f253c99825d427dd243)

Distrotech/cogl,Distrotech/cogl,Distrotech/cogl,Distrotech/cogl