vlc: Remove WORKDIR from CONFIGURE_LINE definition

This is emitted by configure into generated config.h which is used in
src/misc/messages.c and flows into binaries

Fixes
WARNING: vlc-3.0.18-r0 do_package_qa: QA Issue: File /usr/lib/libvlccore.so.9.0.1 in package libvlc contains reference to TMPDIR [buildpaths]

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-multimedia/recipes-multimedia/vlc/vlc_3.0.18.bb

@@ -101,6 +101,7 @@ do_configure:append() {
     for qtpath in adapters components/epg components/playlist components/sout dialogs managers styles util/buttons; do
         mkdir -p "${B}/modules/gui/qt/$qtpath"
     done
+    sed -i -e 's|${WORKDIR}||g' ${B}/config.h
 }
 
 # This recipe packages vlc as a library as well, so qt4 dependencies