Add ISU package

Add ISU package

This patch is a fixed version of commit:

6f01f2f1087bb3d5adf988fc66585be9b23ed02f

which was reverted due to the use of the rpm macro.

This commit adds Individual Service Upgrade (ISU) feature to
enlightenment package. When installed it will allow to upgrade this
service using ISU mechanism, without the need to perform full OS
Upgrade.

This commits add necessary configuration to create upgrade packages of
needed format.  ISU framework itself is maintained and installed
separately.

Change-Id: Ib648b62bcaa3e005095c25af2818a261d2becaaf
Signed-off-by: Mateusz Moscicki <m.moscicki2@samsung.com>