diffstat: enable ptest support

Install diffstat test suite and run it as ptest.

(From OE-Core rev: 63cf8ab1ffdb04278aeb28b6ffce22ff7b272e29)

Signed-off-by: Chong Lu <Chong.Lu@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/diffstat/diffstat/run-ptest

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+./testing/run_test.sh ./testing/case*.pat |sed \
+  -e 's|** ok|PASS|' \
+  -e 's|?? fail|FAIL|'

meta/recipes-devtools/diffstat/diffstat_1.58.bb

@@ -9,14 +9,16 @@ LIC_FILES_CHKSUM = "file://install-sh;endline=42;md5=b3549726c1022bee09c174c72a0
 
 SRC_URI = "ftp://invisible-island.net/diffstat/diffstat-${PV}.tgz \
            file://dirfix.patch \
-           file://aclocal.patch"
+           file://aclocal.patch \
+           file://run-ptest \
+"
 
 SRC_URI[md5sum] = "6d6e13f7dcfe4db5da65c5175260ea47"
 SRC_URI[sha256sum] = "fad5135199c3b9aea132c5d45874248f4ce0ff35f61abb8d03c3b90258713793"
 
 S = "${WORKDIR}/diffstat-${PV}"
 
-inherit autotools gettext
+inherit autotools gettext ptest
 
 do_configure () {
 	if [ ! -e ${S}/acinclude.m4 ]; then
@@ -24,3 +26,7 @@ do_configure () {
 	fi
 	autotools_do_configure
 }
+
+do_install_ptest() {
+	cp -r ${S}/testing ${D}${PTEST_PATH}
+}