Update to fldigi 4.0.9

From ChangeLog

Version 4.0.9

2017-09-03 David Freese <w1hkj@bellsouth.net>

cc95f0a: clock_gettime
5d4008a: spectrum display
6021e18: Test Signal Dialog
ccd3a2e: dxcluster fonts
08aa8f7: smod
6c05fe9: Spot buffer
deb4392: Winkeyer clones
ee3d420: PSK s/n imd

2017-07-25 Matt Roberts <matt@kk5jy.net>

ba2305c: RX Text capture

2017-07-23 David Freese <w1hkj@bellsouth.net>

3229581: PSK viewer

Reported by: portscout