[gimp] build: add build-id to our CI Windows installer build.

[Jehan <jehanp src gnome org>]

commit 2b3c52fe3d34e868da1ca416913e90139a4a378c
Author: Jehan <jehan girinstud io>
Date:   Wed Oct 20 13:53:38 2021 +0200

    build: add build-id to our CI Windows installer build.
    
    I forgot to do this so GIMP 2.99.8 official release is marked as
    "unknown" instead of our official build. It's alright for this one
    (especially for a dev release), just setting this straight for further
    builds.

 build/windows/gitlab-ci/build-gimp-msys2.sh | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/build/windows/gitlab-ci/build-gimp-msys2.sh b/build/windows/gitlab-ci/build-gimp-msys2.sh
index 989a7e9ee1..5081c12ae8 100644
--- a/build/windows/gitlab-ci/build-gimp-msys2.sh
+++ b/build/windows/gitlab-ci/build-gimp-msys2.sh
@@ -100,6 +100,7 @@ cd "_build${ARTIFACTS_SUFFIX}"
 ../autogen.sh --prefix="${GIMP_PREFIX}" \
               --with-directx-sdk="${MSYS2_PREFIX}" \
               --with-javascript=no \
+              --with-build-id=org.gimp.GIMP_official \
               ${GIMP_OPTIONS}
 make -j4
 make install