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_3.7.bb

@@ -0,0 +1,39 @@
+LICENSE = "GPLv3+"
+LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504"
+
+require diffutils.inc
+
+SRC_URI = "${GNU_MIRROR}/diffutils/diffutils-${PV}.tar.xz \
+           file://run-ptest \
+"
+
+SRC_URI[md5sum] = "4824adc0e95dbbf11dfbdfaad6a1e461"
+SRC_URI[sha256sum] = "b3a7a6221c3dc916085f0d205abf6b8e1ba443d4dd965118da364a1dc1cb3a26"
+
+EXTRA_OECONF += "ac_cv_path_PR_PROGRAM=${bindir}/pr --without-libsigsegv-prefix"
+
+# Fix "Argument list too long" error when len(TMPDIR) = 410
+acpaths = "-I ./m4"
+
+inherit ptest
+
+RDEPENDS_${PN}-ptest += "make"
+
+do_install_ptest() {
+	t=${D}${PTEST_PATH}
+	install -D ${S}/build-aux/test-driver $t/build-aux/test-driver
+	cp -r ${S}/tests $t/
+	install ${B}/tests/Makefile $t/tests/
+	sed -e 's,--sysroot=${STAGING_DIR_TARGET},,g' \
+	    -e 's|${DEBUG_PREFIX_MAP}||g' \
+	    -e 's:${HOSTTOOLS_DIR}/::g' \
+	    -e 's:${RECIPE_SYSROOT_NATIVE}::g' \
+	    -e 's:${BASE_WORKDIR}/${MULTIMACH_TARGET_SYS}::g' \
+	    -e 's|^Makefile:|_Makefile:|' \
+	    -e 's|bash|sh|' \
+	    -e 's|^top_srcdir = \(.*\)|top_srcdir = ..\/|' \
+	    -e 's|^srcdir = \(.*\)|srcdir = .|' \
+	    -e 's|"`$(built_programs)`"|diff|' \
+	    -e 's|gawk|awk|g' \
+	    -i $t/tests/Makefile
+}