Remove unneeded dependency on `md5`.
Remove unneeded dependency on `md5`.

We just need some random data, and some systems appear to not have `md5`
preinstalled automatically. Remove the dependency on it and just use the output
of `date` directly as we just need some text that won't be predictable
boilerplate to differentiate it from any other content.

mbrukman/autogen,jomof/cmake-server-java-bindings,jomof/cmake-server-java-bindings,jomof/cmake-server-java-bindings,jomof/cmake-server-java-bindings,mbrukman/autogen,jomof/cmake-server-java-bindings,jomof/cmake-server-java-bindings