gdb: build fix for MIPS + musl libc

The MIPS specific header <sgidefs.h> is provided by glibc and uclibc
but not by musl. Regardless of the libc, the kernel headers provide
<asm/sgidefs.h> which provides the same definitions, so use that
instead.

(From OE-Core rev: 0d7df7217e6c227557936414e64178bb135599fc)

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/gdb/gdb.inc

@@ -6,6 +6,7 @@ SRC_URI += "file://0002-Change-order-of-CFLAGS.patch \
             file://0003-Add-support-for-Renesas-SH-sh4-architecture.patch \
             file://0001-Use-exported-definitions-of-SIGRTMIN.patch \
             file://0001-include-sys-types.h-for-mode_t.patch \
+            file://0001-use-asm-sgidefs.h.patch \
            "
 #LDFLAGS_append = " -s"
 #export CFLAGS_append=" -L${STAGING_LIBDIR}"

meta/recipes-devtools/gdb/gdb/0001-use-asm-sgidefs.h.patch

@@ -0,0 +1,35 @@
+From 677b5b56135141c0d259e370aacd0e11c810aa15 Mon Sep 17 00:00:00 2001
+From: Andre McCurdy <armccurdy@gmail.com>
+Date: Fri, 5 Feb 2016 14:00:00 -0800
+Subject: [PATCH] use <asm/sgidefs.h>
+
+Build fix for MIPS with musl libc
+
+The MIPS specific header <sgidefs.h> is provided by glibc and uclibc
+but not by musl. Regardless of the libc, the kernel headers provide
+<asm/sgidefs.h> which provides the same definitions, so use that
+instead.
+
+Upstream-Status: Pending
+
+Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
+---
+ gdb/mips-linux-nat.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/gdb/mips-linux-nat.c b/gdb/mips-linux-nat.c
+index a36bb63..fd5c705 100644
+--- a/gdb/mips-linux-nat.c
++++ b/gdb/mips-linux-nat.c
+@@ -31,7 +31,7 @@
+ #include "gdb_proc_service.h"
+ #include "gregset.h"
+ 
+-#include <sgidefs.h>
++#include <asm/sgidefs.h>
+ #include <sys/ptrace.h>
+ #include <asm/ptrace.h>
+ 
+-- 
+1.9.1
+