New review comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/27763#discussion_r615342068

Comment:
LDFLAGS doesn't need to be exported. But there's a possibly simpler way of fixing this without those variables.

`make_build_args="LOCALINC=$XBPS_CROSS_BASE/usr/include LOCALLIB=$XBPS_CROSS_BASE/usr/lib FREETYPEINC=$XBPS_CROSS_BASE/usr/include/freetype2 LDFLAGS+=\$(LIBS)"`