grep: bump to version 2.27

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/grep/grep.hash

@@ -1,2 +1,2 @@
 # Locally calculated after checking signature
-sha256 246a8fb37e82aa33d495b07c22fdab994c039ab0f818538eac81b01e78636870  grep-2.26.tar.xz
+sha256 ad4cc44d23074a1c3a8baae8fbafff2a8c60f38a9a6108f985eef6fbee6dcaeb  grep-2.27.tar.xz

package/grep/grep.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-GREP_VERSION = 2.26
+GREP_VERSION = 2.27
 GREP_SITE = $(BR2_GNU_MIRROR)/grep
 GREP_SOURCE = grep-$(GREP_VERSION).tar.xz
 GREP_LICENSE = GPLv3+