Add test suite for some names in 'AutoConf' to test whether the values
generated from 'configure' and the 'Makefile' are valid filepaths,
user names, group names, among others.  Fixes issue 601.

Signed-off-by: Jose A. Lopes <jabolopes@google.com>
Reviewed-by: Klaus Aehlig <aehlig@google.com>