quiethours: fix vibrate option

Change-Id: I4108bdde0fd6745325bf6c6ca99524de7378d5f6
JIRA: CYAN-3731
Issue: https://jira.cyanogenmod.org/browse/CYAN-3731
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Merge pull request #25 from CyanogenMod/cm-11.0

quiethours: fix vibrate option