less: upgrade 661 -> 668

Changelog:
============
* Make 256/true colors work better on Windows without -Da
* Fix build using --with-secure
* Fix crash when using --header on command line
* Fix possible crash when scrolling left/right or toggling -S
* Fix bug when using #stop in a lesskey file
* Fix bug when using --shift or --match-shift on command line with
  a parameter starting with '.'
* Fix bug in R command when file size changes
* Fix bug using --header when file does not fill screen
* Fix ^X bug when output is not a terminal
* Fix bug where ^Z is not handled immediately
* Fix bug where first byte from a LESSOPEN filter is deleted if it is
  greater than 0x7F
* Fix uninitialized variable in edit_ifile
* Fix incorrect handling of UTF-8 chars in prompts

(From OE-Core rev: 71c5b012278fc5c9c0c5e31b46ce348309b4b9e7)

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/less/less_668.bb

@@ -29,7 +29,7 @@ SRC_URI = "http://www.greenwoodsoftware.com/${BPN}/${BPN}-${PV}.tar.gz \
            file://run-ptest \
            "
 
-SRC_URI[sha256sum] = "2b5f0167216e3ef0ffcb0c31c374e287eb035e4e223d5dae315c2783b6e738ed"
+SRC_URI[sha256sum] = "2819f55564d86d542abbecafd82ff61e819a3eec967faa36cd3e68f1596a44b8"
 
 UPSTREAM_CHECK_URI = "http://www.greenwoodsoftware.com/less/download.html"