clr-installer-ci: Add the GTK development support

Missed the development libraries needed for building, but not for running.

Signed-off-by: Mark D Horn <mark.d.horn@intel.com>

clr-installer-ci/Dockerfile

@@ -6,7 +6,7 @@ ENV GOPATH="/go" PATH="/go/bin:${PATH}"
 
 # Update and add bundles
 RUN swupd update && \
-    swupd bundle-add sysadmin-basic storage-utils network-basic go-basic-dev clr-installer-gui && \
+    swupd bundle-add sysadmin-basic storage-utils network-basic go-basic-dev devpkg-gtk3 clr-installer-gui && \
     swupd clean && \
     # Install the Go Linters
     go get -u gopkg.in/alecthomas/gometalinter.v2 && \