OS X friendly install invocation
OS X friendly install invocation

svn path=/trunk/hubbub/; revision=5301

adamwight/wmf-parsoid-libhubbub,servo/libhubbub,servo/libhubbub,Achal-Aggarwal/hibbub,prepare/netsurf_libhubbub,prepare/netsurf_libhubbub,adamwight/wmf-parsoid-libhubbub,prepare/netsurf_libhubbub,adamwight/wmf-parsoid-libhubbub,Achal-Aggarwal/hibbub,prepare/netsurf_libhubbub,adamwight/wmf-parsoid-libhubbub,servo/libhubbub,prepare/netsurf_libhubbub,prepare/netsurf_libhubbub,Achal-Aggarwal/hibbub,adamwight/wmf-parsoid-libhubbub,Achal-Aggarwal/hibbub,servo/libhubbub,servo/libhubbub