xbps-src: perform chroot setup via binary-boostrap or bootstrap-update.

This will improve performance somewhat on buildbot because the bootstrap pkgs
will only be configured once, and not each time due to `xbps-src -t`.

Also remove redundant checks.

xbps-src

@@ -314,6 +314,8 @@ install_bbootstrap() {
 
     msg_normal "Installed bootstrap successfully!\n"
     chroot_prepare $XBPS_TARGET_PKG || msg_error "Failed to initialize chroot!\n"
+    chroot_check
+    chroot_handler clean
 }
 
 reconfigure_bootstrap_pkgs() {
@@ -555,9 +557,13 @@ if [ -n "${NO_COLOR+x}" ]; then
     export NOCOLORS=1
 fi
 
-if [ -f $XBPS_MASTERDIR/.xbps_chroot_init ]; then
-    export CHROOT_READY=1
-fi
+chroot_check() {
+    if [ -f $XBPS_MASTERDIR/.xbps_chroot_init ]; then
+        export CHROOT_READY=1
+    fi
+}
+
+chroot_check
 
 if [ -z "$XBPS_REINIT" -a -s $XBPS_MASTERDIR/.xbps_chroot_init ]; then
     export XBPS_ARCH=${XBPS_ARCH:-$(cat $XBPS_MASTERDIR/.xbps_chroot_init)}
@@ -673,18 +679,14 @@ case "$XBPS_TARGET" in
         install_bbootstrap bootstrap
         ;;
     bootstrap-update)
-        bootstrap_update
+        chroot_handler bootstrap-update
         ;;
     chroot)
         chroot_handler chroot dummy
         ;;
     clean)
         if [ -z "$XBPS_TARGET_PKG" ]; then
-            if [ -n "$CHROOT_READY" -a -z "$IN_CHROOT" ]; then
-                chroot_handler remove-autodeps
-            else
-                remove_pkg_autodeps
-            fi
+            chroot_handler remove-autodeps
             msg_normal "xbps-src: cleaning up masterdir...\n"
             chmod -R +wX $XBPS_MASTERDIR/builddir # Needed to remove Go Modules
             rm -rf $XBPS_MASTERDIR/builddir $XBPS_MASTERDIR/destdir
@@ -707,11 +709,7 @@ case "$XBPS_TARGET" in
         consistency_check
         ;;
     remove-autodeps)
-        if [ -n "$CHROOT_READY" -a -z "$IN_CHROOT" ]; then
-            chroot_handler remove-autodeps
-        else
-            remove_pkg_autodeps
-        fi
+        chroot_handler remove-autodeps
         ;;
     fetch|extract|build|check|configure|install|pkg)
         if [ "$XBPS_TARGET" = "check" ]; then