linuxptp: bump to the latest version

Update Linuxptp to the latest version from 1. September 2017
This update brings bugfixes and minor enhancements.

Signed-off-by: Petr Kulhavy <brain@jikos.cz>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/linuxptp/linuxptp.hash

@@ -1,2 +1,2 @@
 # Locally computed:
-sha256	b8190ab71a99f1dc32847f33cb301d2464d3f9e5f4c51300d55589aff42e8b3f  linuxptp-97c351cafd7327fd28047580c9e2528a6f7e742b.tar.gz
+sha256	40844a69df82853113732f15498f9bce2666d5052293a3d5d40a1983e7b7b6a6  linuxptp-17c9787b1d6891636b5be9e4e5a08278b44e9a7a.tar.gz

package/linuxptp/linuxptp.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LINUXPTP_VERSION = 97c351cafd7327fd28047580c9e2528a6f7e742b
+LINUXPTP_VERSION = 17c9787b1d6891636b5be9e4e5a08278b44e9a7a
 LINUXPTP_SITE_METHOD = git
 LINUXPTP_SITE = git://git.code.sf.net/p/linuxptp/code
 LINUXPTP_LICENSE = GPL-2.0+