spec: rename to image-builder

`image-builder` will be the main entrypoint into the Image Builder
stack. We will rename the repositories later on; but let's start
referring to it in its new official name.

Signed-off-by: Simon de Vlieger <supakeen@redhat.com>

tools/rpm_spec_add_provides_bundle.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/bash
 
-SPEC_FILE=${1:-"image-builder-cli.spec"}
+SPEC_FILE=${1:-"image-builder.spec"}
 
 # Save the list of bundled packages into a file
 WORKDIR=$(mktemp -d)