Add host environment setup scripts

Add host environment setup scripts

Testing KVM4NFV project requires special host environment to get the
best result.

Two scrripts are used to setup the environment. The host-setup0.sh setup
the environment that should take effect before the kernel is bringup,
mostly the grub entries. The host-setup1.sh setup the environment that
takes effect after the kernel is up, like some sysfs entry, interrupt
affinity etc. The host-config provides the configurations.

Change-Id: Ie933ea0089ac82acd39fc48088615215993312f3

Signed-off-by: David Su <david.w.su@intel.com>
Signed-off-by: Yunhong Jiang <yunhong.jiang@linux.intel.com>