chrony: bump to version 2.2

With the new version, documentation is not generated part of the main
build. This removes the need to alter the Makefile to remove the invoke
on the `chrony.txt` target. Cleanup also explicitly disabling seccomp
(since its experimental) and tomcrypt (Buildroot does not have
libtomcrypt at this time).

[Thomas: use tabs for indentation in the definition of
CHRONY_CONF_OPTS.]

Signed-off-by: James Knight <james.knight@rockwellcollins.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/chrony/chrony.hash

@@ -1,3 +1,3 @@
-# From http://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2014/09/msg00000.html
-md5	04ab702fc81150db06809562a9aaed92  chrony-1.31.tar.gz
-sha1	71bb46cad2f15760192795e60efdf23069973908  chrony-1.31.tar.gz
+# From http://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/10/msg00002.html
+md5  17bc77d3d2ce942675f9600b60452717         chrony-2.2.tar.gz
+sha1 eed81b53ef504430128a3a6fa5b56f7ee2fdf2b1 chrony-2.2.tar.gz

package/chrony/chrony.mk

@@ -4,12 +4,17 @@
 #
 ################################################################################
 
-CHRONY_VERSION = 1.31
+CHRONY_VERSION = 2.2
 CHRONY_SITE = http://download.tuxfamily.org/chrony
 CHRONY_LICENSE = GPLv2
 CHRONY_LICENSE_FILES = COPYING
 
-CHRONY_CONF_OPTS = --host-system=Linux --host-machine=$(BR2_ARCH) --prefix=/usr
+CHRONY_CONF_OPTS = \
+	--host-system=Linux \
+	--host-machine=$(BR2_ARCH) \
+	--prefix=/usr \
+	--without-seccomp \
+	--without-tomcrypt
 
 ifeq ($(BR2_PACKAGE_LIBNSS),y)
 CHRONY_DEPENDENCIES += host-pkgconf libnss
@@ -23,12 +28,6 @@ else
 CHRONY_CONF_OPTS += --disable-readline
 endif
 
-# Ditch the doc build, needs makeinfo and we don't need them
-define CHRONY_DISABLE_DOCS
-	$(SED) 's/chronyc chrony.txt/chronyc/' $(@D)/Makefile.in
-endef
-CHRONY_POST_PATCH_HOOKS += CHRONY_DISABLE_DOCS
-
 define CHRONY_CONFIGURE_CMDS
 	cd $(@D) && $(TARGET_CONFIGURE_OPTS) ./configure $(CHRONY_CONF_OPTS)
 endef