e-wm svn: add missing eina dependency

| checking for E_REMOTE... no
| configure: error: Package requirements (
|   ecore >= 1.0.999
|   ecore-ipc >= 1.0.999
|   eet >= 1.4.0
|   eina >= 1.0.999
| ) were not met:
|
| No package 'eina' found

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>