don't use function syntax which /bin/sh doesn't grok

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57564 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

misc/scripts/makeunixtags.sh

@@ -9,7 +9,7 @@
 
 # this function should be called with a single parameter containing addition
 # port-specific directories to scan
-function create_tags()
+create_tags()
 {
 ctags --totals --c++-kinds=+px --language-force=c++ \
 	--exclude=include/wx/vms_x_fix.h \