Revert "gcc: remove 'gcc:init' target"

This reverts commit 2786190c0c3f649867593e9e219d23b9edec130f.
Revert "plymouth-lite: dont install 'gcc:init'"

This reverts commit df772e2bfe4b285246c5d7787c5d752d1d3af4dc.
Revert "v86d: dont install 'gcc:init'"

This reverts commit 26adf2616eba7b301afb90a90604db3787e48c04.