xbps-src: multiple performance improvements.

- use xbps-checkvers(1) to resolve dependencies.
- all dependencies are installed at once for the host and target.
- the `show-build-deps` target is now much faster.
- the `update-bulk/show-repo-updates` targets are now much faster.
- the `update-sys/show-sys-updates` targets are now much faster.
- the `bootstrap` target now works on musl hosts.
- simplified some loops.
- use cut(1) rather than awk(1) where applicable.
- multiple random changes to improve performance.

Based on work started by @Duncaen on https://github.com/void-linux/void-packages/pull/12433

Close https://github.com/void-linux/void-packages/pull/12433
Close https://github.com/void-linux/void-packages/pull/11282

common/hooks/pre-pkg/99-pkglint.sh

@@ -119,7 +119,7 @@ hook() {
 				msg_red "${pkgver}: SONAME bump detected: ${libname}.so.${conflictRev} -> ${libname}.so.${rev}\n"
 				msg_red "${pkgver}: please update common/shlibs with this line: \"${libname}.so.${rev} ${pkgver}\"\n"
 				msg_red "${pkgver}: all reverse dependencies should also be revbumped to be rebuilt against ${libname}.so.${rev}:\n"
-				_revdeps=$($XBPS_QUERY_XCMD -Rs ${libname}.so -p shlib-requires|awk '{print $1}')
+				_revdeps=$($XBPS_QUERY_XCMD -Rs ${libname}.so -p shlib-requires|cut -d ' ' -f1)
 				for x in ${_revdeps}; do
 					msg_red "   ${x%:}\n"
 				done
@@ -128,7 +128,7 @@ hook() {
 			# Try to match provided shlibs in virtual packages.
 			for f in ${provides}; do
 				_vpkgname="$($XBPS_UHELPER_CMD getpkgname ${f} 2>/dev/null)"
-				_spkgname="$(grep "^${filename}" $mapshlibs | awk '{print $2}')"
+				_spkgname="$(grep "^${filename}" $mapshlibs | cut -d ' ' -f2)"
 				_libpkgname="$($XBPS_UHELPER_CMD getpkgname ${_spkgname} 2>/dev/null)"
 				if [ -z "${_spkgname}" -o  -z "${_libpkgname}" ]; then
 					continue