package/grep: fix build with microblazeel and or1k

Fix the following build failure with microblazeel and or1k raised since
bump to version 3.7 in commit f1f0b633eb1c4bc006b95daad8f299028e89d19d:

sigsegv.c: In function 'sigsegv_handler':
sigsegv.c:979:28: error: 'struct vma_struct' has no member named 'is_near_this'
  979 |                       : vma.is_near_this (addr, &vma))
      |

Fixes:
 - http://autobuild.buildroot.org/results/78142463ba8cc5f6c1bf15295095a271422294f4
 - http://autobuild.buildroot.org/results/f300b1b5e958f096a9d58197a44dcf0c2abd3585

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/grep/0001-sigsegv-fix-build-on-microblazeel.patch

@@ -0,0 +1,32 @@
+From 3079cea1b18fe72aa1da6b04e561abfb36f4f443 Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Thu, 11 Nov 2021 09:57:23 +0100
+Subject: sigsegv: fix build on microblazeel
+
+Fix the following build failure on microblazeel with diffutils 3.8:
+sigsegv.c:979:28: error: 'struct vma_struct' has no member named 'is_near_this'
+http://autobuild.buildroot.org/results/5ecd55b7c72f9630a7acc72341ccb60e94ddb574
+
+[Retrieved from:
+https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=3079cea1b18fe72aa1da6b04e561abfb36f4f443]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ m4/stack-direction.m4 | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/m4/stack-direction.m4 b/m4/stack-direction.m4
+index c90d69733..70286c8f5 100644
+--- a/m4/stack-direction.m4
++++ b/m4/stack-direction.m4
+@@ -37,7 +37,7 @@ AC_DEFUN([SV_STACK_DIRECTION],
+       m68* | \
+       m88k | \
+       mcore | \
+-      microblaze | \
++      microblaze* | \
+       mips* | \
+       mmix | \
+       mn10200 | \
+-- 
+cgit v1.2.1
+

package/grep/0002-sigsegv-fix-build-on-or1k.patch

@@ -0,0 +1,32 @@
+From 496c1740e5475be85b65fdb2b143771f09ed27cb Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Thu, 11 Nov 2021 10:06:31 +0100
+Subject: sigsegv: fix build on or1k
+
+Fix the following build failure on or1k with diffutils 3.8
+https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=e54aa6196947ed22ff66bcd714e4fc7bd0c5c3b4
+sigsegv.c:979:28: error: 'struct vma_struct' has no member named 'is_near_this'
+http://autobuild.buildroot.org/results/5427e52489d29ed4f18b4a70b3c36f0f7bb0ddd9
+
+[Retrieved from:
+https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=496c1740e5475be85b65fdb2b143771f09ed27cb]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ m4/stack-direction.m4 | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/m4/stack-direction.m4 b/m4/stack-direction.m4
+index 70286c8f5..29e398d77 100644
+--- a/m4/stack-direction.m4
++++ b/m4/stack-direction.m4
+@@ -45,6 +45,7 @@ AC_DEFUN([SV_STACK_DIRECTION],
+       nios2 | \
+       nds32* | \
+       ns32k | \
++      or1k | \
+       pdp11 | \
+       pj* | \
+       powerpc* | rs6000 | \
+-- 
+cgit v1.2.1
+

package/grep/grep.mk

@@ -10,6 +10,8 @@ GREP_SOURCE = grep-$(GREP_VERSION).tar.xz
 GREP_LICENSE = GPL-3.0+
 GREP_LICENSE_FILES = COPYING
 GREP_CPE_ID_VENDOR = gnu
+# We're patching m4/stack-direction.m4
+GREP_AUTORECONF = YES
 GREP_DEPENDENCIES = $(TARGET_NLS_DEPENDENCIES)
 # install into /bin like busybox grep
 GREP_CONF_OPTS = --exec-prefix=/