build: add packaging script for Solaris 10 SRV4 packages.

./buildpkg.sh mongo-c-driver-0.94.3.tar.gz mongo-c-driver 0.94.3 i386

You can replace i386 with sparc to build on a sparc machine.

This will include both 32-bit and 64-bit versions of the libraries.
The binaries will be 64-bit.