coreutils: Add config.h to ptest package

This is needed by several tests during run on target

Fixes
grep: /usr/lib/coreutils/ptest/lib/config.h: No such file or directory
inotify-race.sh: skipped test: inotify is not supported

More tests are now passing

 ============================================================================
 Testsuite summary for GNU coreutils 9.4
 ============================================================================
 # TOTAL: 643
-# PASS:  509
-# SKIP:  131
+# PASS:  516
+# SKIP:  124

(From OE-Core rev: 66ea2aab453384d4d265969a209ee6b156dd421d)

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

meta/recipes-core/coreutils/coreutils_9.4.bb

@@ -181,6 +181,7 @@ do_install_ptest () {
     sed -i 's/ginstall/install/g'  `grep -R ginstall ${D}${PTEST_PATH}/tests | awk -F: '{print $1}' | uniq`
     install -d ${D}${PTEST_PATH}/build-aux
     install ${S}/build-aux/test-driver ${D}${PTEST_PATH}/build-aux/
+    install -Dm 0644 ${B}/lib/config.h ${D}${PTEST_PATH}/lib/config.h
     cp ${B}/Makefile ${D}${PTEST_PATH}/
     cp ${S}/init.cfg ${D}${PTEST_PATH}/
     cp -r ${B}/src ${D}${PTEST_PATH}/