Fixed issue #6: file-contains-current-date

Remove the line with the build date of the library from the
raw serialized file format. It doesn't help anything and it
bothers the openSUSE packaging guys. Having the current
date into a binary triggers a warning:

"Current date containing causes unnecessary package
republishing."

Confirmed that "strings libcpuid.a | grep 2014" no longer
contains the current date.