selftest: add save.env.sh helper script.

This can be used to store the environment from within
make testenv.

It can be restored with:

. bin/restore.env.source

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

selftest/save.env.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+{
+	vars=`set | \
+		grep "^[a-zA-Z][^=]*='[^']*'$" | \
+		grep -v '^IFS=' | \
+		grep -v '^TERM' | \
+		grep -v '^PPID' | \
+		grep -v '^PS[1-9]=' | \
+		cat `
+	echo "${vars}"
+	echo "${vars}" | sed -e 's!^\([a-zA-Z][^=]*\)=.*$!export \1!'
+} > bin/restore.env.source
+
+echo "RUN: '. bin/restore.env.source'"