libunwind: bump to version 1.3.1

Libunwind provides a sigreturn stub for x86 in version 1.2 [1].  However
the arch still depends on setcontext() which is unavailable in musl-libc
and which is supposed to be "deprecated everywhere" [2]

 [1] x86 sigreturn unimplemented for some libcs,
     https://github.com/libunwind/libunwind/issues/13
 [2] setcontext deprecated on x86,
     https://github.com/libunwind/libunwind/issues/69

Refs: https://github.com/openwrt/packages/issues/8548#issuecomment-497791552
Reported-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

package/libs/libunwind/Makefile

@@ -1,6 +1,6 @@
 #
 # Copyright (C) 2008-2013 OpenWrt.org
-# Copyright (C) 2017 Yousong Zhou <yszhou4tech@gmail.com>
+# Copyright (C) 2017-2019 Yousong Zhou <yszhou4tech@gmail.com>
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -9,12 +9,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libunwind
-PKG_VERSION:=1.2.1
-PKG_RELEASE:=3
+PKG_VERSION:=1.3.1
+PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=@SAVANNAH/$(PKG_NAME)
-PKG_HASH:=3f3ecb90e28cbe53fba7a4a27ccce7aad188d3210bb1964a923a731a27a75acb
+PKG_HASH:=43997a3939b6ccdf2f669b50fdb8a4d3205374728c2923ddc2354c65260214f8
 PKG_FIXUP:=autoreconf
 PKG_INSTALL:=1
 
@@ -32,7 +32,7 @@ define Package/libunwind
   CATEGORY:=Libraries
   TITLE:=The libunwind project
   URL:=http://www.nongnu.org/libunwind/
-  DEPENDS:=@((mips||mipsel||i386||x86_64||arm||aarch64)||(USE_GLIBC&&powerpc))
+  DEPENDS:=@((mips||mipsel||x86_64||arm||aarch64)||(USE_GLIBC&&(powerpc||i386)))
   ABI_VERSION:=8
 endef
 
@@ -42,6 +42,7 @@ endef
 
 CONFIGURE_ARGS += \
 	--disable-documentation \
+	--disable-tests \
 	--enable-minidebuginfo=no \
 
 

package/libs/libunwind/patches/001-disable-tests.patch

@@ -1,11 +0,0 @@
---- a/Makefile.am
-+++ b/Makefile.am
-@@ -42,7 +42,7 @@ endif
- 
- nodist_include_HEADERS = include/libunwind-common.h
- 
--SUBDIRS = src tests
-+SUBDIRS = src
- 
- if CONFIG_DOCS
- SUBDIRS += doc