xbps-src: run pre-pkg hooks in the install to destdir target.

The prepare-32bit hook has been moved to the pre-pkg stage and now
those hooks are executed as part of the install phase. That means that
pre-pkg hooks are now independently run for the subpkgs and the sourcepkg
after the install-destdir phase and pre/do/install hooks.

As bonus, finally correct rdeps can now be collected for the 32bit pkgs
and works for all them, without the need to sort the order of subpkgs!

common/xbps-src/shutils/common.sh

@@ -195,13 +195,8 @@ get_subpkgs() {
     while [ $# -gt 0 ]; do
         list+=" ${3%_package}"; shift 3
     done
-    # first all non development pkgs ...
     for f in ${list}; do
-        [[ $f =~ '-devel' ]] || echo "$f"
-    done
-    # ... and then only development pkgs
-    for f in ${list}; do
-        [[ $f =~ '-devel' ]] && echo "$f"
+        echo "$f"
     done
 }