fix PR5954, patch by Roman Divacky.

I don't have a great way to test this myself (it's linux/bsd only), 
but Roman says it works. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97069 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/autoconf/ExportMap.map b/autoconf/ExportMap.map
index 43e310e..17b185f 100644
--- a/autoconf/ExportMap.map
+++ b/autoconf/ExportMap.map
@@ -1,4 +1,7 @@
 {
 	global: main;
+		__progname;
+		environ;
+
 	local: *;
 };