Add -rdynamic to freebsd and openbsd. Patch by Ruben.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@118771 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 4bf2975..bf40760 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -2929,6 +2929,8 @@
   if (Args.hasArg(options::OPT_static)) {
     CmdArgs.push_back("-Bstatic");
   } else {
+    if (Args.hasArg(options::OPT_rdynamic))
+      CmdArgs.push_back("-export-dynamic");
     CmdArgs.push_back("--eh-frame-hdr");
     CmdArgs.push_back("-Bdynamic");
     if (Args.hasArg(options::OPT_shared)) {
@@ -3051,6 +3053,8 @@
   if (Args.hasArg(options::OPT_static)) {
     CmdArgs.push_back("-Bstatic");
   } else {
+    if (Args.hasArg(options::OPT_rdynamic))
+      CmdArgs.push_back("-export-dynamic");
     CmdArgs.push_back("--eh-frame-hdr");
     if (Args.hasArg(options::OPT_shared)) {
       CmdArgs.push_back("-Bshareable");