Rename common_plugin_ftable to krb5_plugin_common_ftable.
Create lib/krb5/common_plugin.h to include the structure and typedef.
The common_plugin.h header is now included by ccache_plugin.h
along with a prototype for the required ccache_ops_plugin_load()
function.
Change-Id: I2b27d6d0f5cf0544482c3f01784fef945e12e8d8