math/octave: Set correct USE_LDCONFIG=

[joneum]

Summary

math/octave: Set correct USE_LDCONFIG=

PR: 223690
Reported by: joneum
Approved by: maintainer timeout (2 weeks) xxx (mentor)
#Differential Revision: https://reviews.freebsd.org/Dxxxxx

Test Plan

poudriere testport:

10.3-amd64
10.3-i386
10.4-amd64
10.4-i386
11.1-amd64
11.1-i386
12.0-CURRENT r325045 amd64
12.0-CURRENT r325045 i386

[rene]

Hmm, there are some stage warnings, bu they are probably for another PR:

====> Running Q/A tests (stage-qa)
Warning: 'lib/octave/4.0.3/liboctinterp.so.3.1.1' is not stripped consider trying INSTALL_TARGET=install-strip or using ${STRIP_CMD}
Warning: 'lib/octave/4.0.3/liboctgui.so.1.1.0' is not stripped consider trying INSTALL_TARGET=install-strip or using ${STRIP_CMD}
Warning: 'lib/octave/4.0.3/liboctave.so.3.0.2' is not stripped consider trying INSTALL_TARGET=install-strip or using ${STRIP_CMD}
Warning: you need USES=desktop-file-utils
Error: /usr/local/bin/octave-cli-4.0.3 is linked to /usr/local/lib/libreadline.so.7 from devel/readline but it is not declared as a dependency
Warning: you need USES+=readline
Error: /usr/local/lib/octave/4.0.3/oct/amd64-portbld-freebsd10.3/__fltk_uigetfile__.oct is linked to /usr/local/lib/libXrender.so.1 from x11/libXrender but it is not declared as a dependency
Warning: you need USE_XORG+=xrender
Error: /usr/local/lib/octave/4.0.3/oct/amd64-portbld-freebsd10.3/__fltk_uigetfile__.oct is linked to /usr/local/lib/libXcursor.so.1 from x11/libXcursor but it is not declared as a dependency
Warning: you need USE_XORG+=xcursor
Error: /usr/local/lib/octave/4.0.3/oct/amd64-portbld-freebsd10.3/__fltk_uigetfile__.oct is linked to /usr/local/lib/libXinerama.so.1 from x11/libXinerama but it is not declared as a dependency
Warning: you need USE_XORG+=xinerama