17efb6163a7 had a couple mistakes that were causing issues with the
generated dependencies for -32bit and -dbg packages because they are
~extra special~
to XBPS_STATEDIR. There's no need for them to pollute PKGDESTDIR. Keep
INSTALL.msg/REMOVE.msg handling as-is for now because it's a little more
complex. Keep the pkglints for these files because xbps still ignores
them.
In a later change, we would like to generate runtime-deps between
sub-packages.
In order to do that, we can add everything into etc/shlibs or we can
look into other subpackages directly. The former is cumbersome if such
package has lot of shared-objects. The latter requires traversing and
checking a lot of files. Furtunately, we can speed up the latter one by
storing all shared-objects' information in a centralised place.
In a later change, we will generate shlib-depends cross subpkgs during
pre-pkg stage. Thus we need shlib-provides information of all subpkgs
ready before pre-pkg is run.
Those information can only be read in post-install stage at the
eariliest.
Let's move the shlib-provides to post-install. This hook requires
prepare-32bit, so, let's move that hook, too.
