Added `--no-same-owner` option to tar command.

This ensures extracted tarballs are owned by root when running the
build as root.

Review: https://reviews.apache.org/r/72859
diff --git a/3rdparty/stout/3rdparty/Makefile.am b/3rdparty/stout/3rdparty/Makefile.am
index 5a88889..7edb7d2 100644
--- a/3rdparty/stout/3rdparty/Makefile.am
+++ b/3rdparty/stout/3rdparty/Makefile.am
@@ -71,7 +71,7 @@
 # which cause the packages to get extracted as necessary. We also
 # apply any patches as appropriate.
 %-stamp: $(BUNDLED_DIR)/%.tar.gz
-	gzip -d -c $^ | tar xf -
+	gzip -d -c $^ | tar xf - --no-same-owner
 	test ! -e $(top_srcdir)/../$*.patch || patch -d $* -p1 <$(top_srcdir)/../$*.patch
 	touch $@