mk/tools: Avoid print(1) when using bash on SunOS.

bash does not have a print builtin, and on SunOS there is a /usr/bin/print
which is found by the libtool configure script (which has also made its way
into lots of third-party packages) and used for printing strings.

Create a broken print wrapper so that this is not found and the printf builtin
is used instead, significantly improving performance.

(jperkin)