fix kernel module linking for xtensa, from buildroot

toolchain/binutils/patches/2.24/ld-segfault-linux-modules.xtensa

@@ -0,0 +1,47 @@
+From e7d17e71cdc10a2e81e454ce3b9637f1b2a587f2 Mon Sep 17 00:00:00 2001
+From: Max Filippov <jcmvbkbc@gmail.com>
+Date: Thu, 10 Jul 2014 01:47:33 +0400
+Subject: [PATCH] Fix xtensa ld segfault when linking linux modules
+
+is_inconsistent_linkonce_section makes an assumption that section name
+that starts with ".gnu.linkonce.prop." has one more dot in its suffix.
+However gas generates such section name by insertion of "prop." right
+after ".gnu.linkonce." part of the name of the original section. So, for
+section named ".gnu.linkonce.this_module" corresponding property section
+name does not satisfy the assumption. Such section names are common in
+linux modules. This bug was exposed by the patch "a35d5e8 Fix alignment
+for the first section frag on xtensa", that makes gas produce property
+section for each section that has ".align" directive in it.
+
+Use suffix that immediately follows ".gnu.linkonce.prop." when there are
+no more dots following it.
+
+2014-07-10  Max Filippov  <jcmvbkbc@gmail.com>
+
+ld/
+    * emultempl/xtensaelf.em (is_inconsistent_linkonce_section):
+    correctly handle missing dot in section name after
+    ".gnu.linkonce.prop.".
+---
+Backported from: e7d17e71cdc10a2e81e454ce3b9637f1b2a587f2
+Changes to ld/ChangeLog file are dropped.
+
+ ld/emultempl/xtensaelf.em | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/ld/emultempl/xtensaelf.em b/ld/emultempl/xtensaelf.em
+index 151eea4..948d18d 100644
+--- a/ld/emultempl/xtensaelf.em
++++ b/ld/emultempl/xtensaelf.em
+@@ -1310,7 +1310,7 @@ is_inconsistent_linkonce_section (asection *sec)
+      for Tensilica's XCC compiler.  */
+   name = sec_name + linkonce_len;
+   if (CONST_STRNEQ (name, "prop."))
+-    name = strchr (name + 5, '.') + 1;
++    name = strchr (name + 5, '.') ? strchr (name + 5, '.') + 1 : name + 5;
+   else if (name[1] == '.'
+ 	   && (name[0] == 'p' || name[0] == 'e' || name[0] == 'h'))
+     name += 2;
+-- 
+1.8.1.4
+