/usr/lib/php5/build/ltmain.sh is in php5-dev 5.3.10-1ubuntu3.26.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/php5/build/../../../share/libtool/config/ltmain.sh
/usr/lib/php5/build/../../../share/libtool/config/ltmain.sh