meta-ibm: phosphor-ledcontroller has moved

Recent changes moved this binary from /usr/sbin to
/usr/libexec/phosphor-led-sysfs/. Update this service to reflect that.

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I16df4cb1942ac93dfb8b487e58ff60ea67c58d28
diff --git a/meta-ibm/recipes-phosphor/leds/phosphor-led-manager/obmc-led-create-virtual-leds@.service b/meta-ibm/recipes-phosphor/leds/phosphor-led-manager/obmc-led-create-virtual-leds@.service
index 41bd081..19771d5 100644
--- a/meta-ibm/recipes-phosphor/leds/phosphor-led-manager/obmc-led-create-virtual-leds@.service
+++ b/meta-ibm/recipes-phosphor/leds/phosphor-led-manager/obmc-led-create-virtual-leds@.service
@@ -3,5 +3,5 @@
 
 [Service]
 Restart=always
-ExecStart=/usr/sbin/phosphor-ledcontroller -p %f
+ExecStart=/usr/libexec/phosphor-led-sysfs/phosphor-ledcontroller -p %f
 SyslogIdentifier=obmc-led-create-virtual-leds