diffutils: upgrade to 3.7

The following two patches are removed as they are not needed anymore.

  0001-Unset-need_charset_alias-when-building-for-musl.patch
  0001-explicitly-disable-replacing-getopt.patch

(From OE-Core rev: cc8c9b36258d0bb1635b2d4644d7fc64357c5110)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/diffutils/diffutils-3.6/0001-Unset-need_charset_alias-when-building-for-musl.patch

@@ -1,33 +0,0 @@
-From b9565dc2fe0c4f7daaec91b7e83bc7313dee2f4a Mon Sep 17 00:00:00 2001
-From: Khem Raj <raj.khem@gmail.com>
-Date: Mon, 13 Apr 2015 17:02:13 -0700
-Subject: [PATCH] Unset need_charset_alias when building for musl
-
-localcharset uses ac_cv_gnu_library_2_1 from glibc21.m4
-which actually shoudl be fixed in gnulib and then all downstream
-projects will get it eventually. For now we apply the fix to
-coreutils
-
-Upstream-Status: Pending
-
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
----
- lib/gnulib.mk | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/lib/gnulib.mk b/lib/gnulib.mk
-index e1d74db..c0e92dd 100644
---- a/lib/gnulib.mk
-+++ b/lib/gnulib.mk
-@@ -1882,7 +1882,7 @@ install-exec-localcharset: all-local
- 	  case '$(host_os)' in \
- 	    darwin[56]*) \
- 	      need_charset_alias=true ;; \
--	    darwin* | cygwin* | mingw* | pw32* | cegcc*) \
-+	    darwin* | cygwin* | mingw* | pw32* | cegcc* | linux-musl*) \
- 	      need_charset_alias=false ;; \
- 	    *) \
- 	      need_charset_alias=true ;; \
--- 
-2.1.4
-

meta/recipes-extended/diffutils/diffutils-3.6/0001-explicitly-disable-replacing-getopt.patch

@@ -1,30 +0,0 @@
-Subject: explicitly disable replacing getopt
-
-Explicitly disable replacing getopt to avoid compilation error like below.
-
-  xstrtol-error.c:84:26: error: invalid use of undefined type 'struct rpl_option'
-
-Upstream-Status: Inappropriate [workaround]
-Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
----
- m4/getopt.m4 | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/m4/getopt.m4 b/m4/getopt.m4
-index 3ebc7b7..8934426 100644
---- a/m4/getopt.m4
-+++ b/m4/getopt.m4
-@@ -22,8 +22,8 @@ AC_DEFUN([gl_FUNC_GETOPT_POSIX],
-     fi
-   ])
-   if test $REPLACE_GETOPT = 1; then
--    dnl Arrange for getopt.h to be created.
--    gl_GETOPT_SUBSTITUTE_HEADER
-+    dnl Explicitly disable replacing getopt
-+    :
-   fi
- ])
- 
--- 
-2.11.0
-

meta/recipes-extended/diffutils/diffutils_3.7.bb

@@ -4,13 +4,11 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504"
 require diffutils.inc
 
 SRC_URI = "${GNU_MIRROR}/diffutils/diffutils-${PV}.tar.xz \
-           file://0001-Unset-need_charset_alias-when-building-for-musl.patch \
            file://run-ptest \
 "
-SRC_URI_append_libc-glibc = " file://0001-explicitly-disable-replacing-getopt.patch"
 
-SRC_URI[md5sum] = "07cf286672ced26fba54cd0313bdc071"
-SRC_URI[sha256sum] = "d621e8bdd4b573918c8145f7ae61817d1be9deb4c8d2328a65cea8e11d783bd6"
+SRC_URI[md5sum] = "4824adc0e95dbbf11dfbdfaad6a1e461"
+SRC_URI[sha256sum] = "b3a7a6221c3dc916085f0d205abf6b8e1ba443d4dd965118da364a1dc1cb3a26"
 
 EXTRA_OECONF += "ac_cv_path_PR_PROGRAM=${bindir}/pr --without-libsigsegv-prefix"