eglibc: fix directory cleanup for 2.17

Commit e0c2dd275827a4b37b8116d0f0119333638461af broke building
eglibc 2.17, which still ships pt_chown under eglibc/ directory.

Fix by only deleting directory when pt_chown is not there.

Cc: Khem Raj <raj.khem@gmail.com>

(From OE-Core rev: 10722a37bb7efa563425a7389100b9322d96492e)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/eglibc/eglibc-package.inc

@@ -75,7 +75,7 @@ do_install_append () {
 	rm -rf ${D}${localstatedir}
 
 	# remove empty eglibc dir
-	if [ -d ${D}${libdir}/eglibc ]; then
+	if [ -d ${D}${libdir}/eglibc -a ! -e ${D}${libdir}/eglibc/pt_chown ]; then
 		rmdir ${D}${libdir}/eglibc
 	fi
 	oe_multilib_header bits/syscall.h