weston-launch: Fix the typo for real this time

Thanks to MonkeyofDoom for point this out.  I'm still adjusting to the
fact that there's no 'd' in privilege, but I'll get over it.
diff --git a/src/weston-launch.c b/src/weston-launch.c
index 4fd747d..4c07d8e 100644
--- a/src/weston-launch.c
+++ b/src/weston-launch.c
@@ -635,7 +635,7 @@
                     initgroups(wl.pw->pw_name, wl.pw->pw_gid) < 0 ||
 #endif
 		    setuid(wl.pw->pw_uid) < 0)
-			error(1, errno, "dropping priviledges failed");
+			error(1, errno, "dropping privileges failed");
 
 
 		if (sleep_fork) {