busybox-1.6.0.config: disable TASKSET.

Disable CONFIG_TASKSET as it only compiles if
sched_{g,s}etaffinity support is available.

package/busybox/busybox-1.6.0.config

@@ -495,7 +495,7 @@ CONFIG_RUNLEVEL=y
 # CONFIG_RX is not set
 CONFIG_STRINGS=y
 CONFIG_SETSID=y
-CONFIG_TASKSET=y
+# CONFIG_TASKSET is not set
 CONFIG_FEATURE_TASKSET_FANCY=y
 CONFIG_TIME=y
 CONFIG_WATCHDOG=y