Add spec file for WildFly 8

This patch adds a build script and spec file that can be used to
download and repackage the .zip distribution of WildFly 8 as a RPM
package.

Change-Id: Ib835a3575f8404ad1e22f8877dd6ad2f60de4d47
Bug-Url: https://bugzilla.redhat.com/1121327
Signed-off-by: Juan Hernandez <juan.hernandez@redhat.com>