xbps-src: setup_pkg: re-read conf file to propagate vars to build.sh.

common/xbps-src/shutils/common.sh

@@ -95,7 +95,6 @@ set_build_options() {
         return 0
     fi
 
-    . $XBPS_CONFIG_FILE 2>/dev/null
 
     for f in ${build_options}; do
         _pkgname=${pkgname//\-/\_}
@@ -223,6 +222,8 @@ setup_pkg() {
 
     unset_package_funcs
 
+    . $XBPS_CONFIG_FILE 2>/dev/null
+
     if [ -n "$cross" ]; then
         source_file $XBPS_CROSSPFDIR/${cross}.sh