Prepare SVG export with wx30

git-svn-id: http://svn.code.sf.net/p/codeblocks/code/trunk@9936 2a5c6006-c6dd-42ca-98ab-0921f2732cef
Removed library wxpropgrid from library list.
Moved the define of WXMAKINGDLL to target level.
Removed define of WXMAKINGDLL from the 3 targets safe to change.