maintainer-feedback requested: [Bug 276135] devel/libgudev: fix build with clang 18

Bugzilla Automation <bugzilla@FreeBSD.org> has asked freebsd-x11 (Nobody)
<x11@FreeBSD.org> for maintainer-feedback:
Bug 276135: devel/libgudev: fix build with clang 18
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276135



--- Description ---
Clang 18 no longer accepts -export-dynamic, which is a linker option,
resulting in an error building devel/libgudev:

  cc  -o gudev/libgudev-1.0.so.0.3.0
gudev/libgudev-1.0.so.0.3.0.p/meson-generated_.._gudevenumtypes.c.o
gudev/libgudev-1.0.so.0.3.0.p/gudevclient.c.o
gudev/libgudev-1.0.so.0.3.0.p/gudevdevice.c.o
gudev/libgudev-1.0.so.0.3.0.p/gudevenumerator.c.o -Wl,--as-needed
-Wl,--no-undefined -Wl,-O1 -shared -fPIC -Wl,--start-group
-Wl,-soname,libgudev-1.0.so.0 -fstack-protector-strong -O2 -pipe
-fstack-protector-strong -fno-strict-aliasing -Wl,-rpath,/usr/local/lib
-Wl,-rpath-link,/usr/local/lib -export-dynamic
-Wl,--version-script,/wrkdirs/share/dim/ports/devel/libgudev/work/libgudev-237/
libgudev-1.0.sym
/usr/local/lib/libglib-2.0.so /usr/local/lib/libintl.so
/usr/local/lib/libgobject-2.0.so /usr/local/lib/libudev.so -Wl,--end-group
  cc: error: unknown argument: '-export-dynamic'

Fix this by using the correct spelling: -Wl,--export-dynamic.