x11/x11-links problem in -current

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

I haven't tested if this happens on NetBSD8, on -current every time I
reinstall x11-lnks (after osabi, hence on every bump of -current), I
have to:

--- /usr/pkg/share/x11-links/lib/pkgconfig/gl.pc.ORIG     2019-05-09
19:52:57.141922336 +0100
+++ /usr/pkg/share/x11-links/lib/pkgconfig/gl.pc        2019-05-09
19:53:10.255830572 +0100
@@ -7,7 +7,7 @@
 Description: Mesa OpenGL library
 Requires.private: x11 xext
 Version: 18.3.4
-Libs: -Wl,-rpath,${libdir} -L${libdir} -l@GL_PKGCONF_LIB@
+Libs: -Wl,-rpath,${libdir} -L${libdir} -lGL
 Libs.private: -lm -lpthread
 Cflags: -I${includedir}
 glx_tls: no

I couldn't find anything about GL_PKGCONF_LIB so far ( but haven't
looked closely anyway, as it is a trivial fix). Without it a number of
packages using libGL fail.

Cd'd pkgsrc-users@ , listed as maintainer...

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