criu: Version 2.7

Not a lot this time, just a bunch of bugfixes and improvements.
A lot has happened in -dev branch around compel, hopefully the
next release will have it.
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

Makefile.versions

 #
 # CRIU version.
 CRIU_VERSION_MAJOR	:= 2
-CRIU_VERSION_MINOR	:= 6
+CRIU_VERSION_MINOR	:= 7
 CRIU_VERSION_SUBLEVEL	:=
 CRIU_VERSION_EXTRA	:=
-CRIU_VERSION_NAME	:= Paper Crane
+CRIU_VERSION_NAME	:= Rubber Owl
 CRIU_VERSION		:= $(CRIU_VERSION_MAJOR)$(if $(CRIU_VERSION_MINOR),.$(CRIU_VERSION_MINOR))$(if $(CRIU_VERSION_SUBLEVEL),.$(CRIU_VERSION_SUBLEVEL))$(if $(CRIU_VERSION_EXTRA),.$(CRIU_VERSION_EXTRA))
 
 export CRIU_VERSION_MAJOR CRIU_VERSION_MINOR CRIU_VERSION_SUBLEVEL