Ports: Point libexpat to the correct config.sub location

Author: https://github.com/archanox
Commit: https://github.com/SerenityOS/serenity/commit/7b2e0af13f
Pull-request: https://github.com/SerenityOS/serenity/pull/12966
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/linusg

Ports/libexpat/package.sh

@@ -3,6 +3,7 @@ port=libexpat
 version=2.2.9
 useconfigure=true
 use_fresh_config_sub=true
+config_sub_path=conftools/config.sub
 files="https://github.com/libexpat/libexpat/releases/download/R_2_2_9/expat-${version}.tar.xz expat-${version}.tar.xz
 https://github.com/libexpat/libexpat/releases/download/R_2_2_9/expat-${version}.tar.xz.asc expat-${version}.tar.xz.asc"
 workdir=expat-${version}