make 'make tags' work in case of out-of-tree build

Change-Id: I6c25988497208d9ae652feb1f9c37032f22ae376
Reviewed-on: https://gerrit.libreoffice.org/12295Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>

solenv/bin/create-tags

@@ -12,7 +12,7 @@ omnicppoptions="--c++-kinds=+p --fields=+iaS --extra=+q"
 ctags -h "+.hdl.hrc" --langmap=c:+.hrc.src,c++:+.hdl $omnicppoptions \
       --languages=-HTML,Java,JavaScript \
       -R --exclude=instdir --exclude=workdir \
-      --exclude=clone --totals=yes *
+      --exclude=clone --totals=yes ${SRCDIR:-*}
 
 ctags -h "+.hdl.hrc" --langmap=c:+.hrc.src,c++:+.hdl $omnicppoptions \
       --languages=-HTML,Java,JavaScript \