Revert "Revert "Upgrade to 5.0.71.48"" DO NOT MERGE

This reverts commit f2e3994fa5148cc3d9946666f0b0596290192b0e,
and updates the x64 makefile properly so it doesn't break that
build.

FPIIM-449

Change-Id: Ib83e35bfbae6af627451c926a9650ec57c045605
(cherry picked from commit 109988c7ccb6f3fd1a58574fa3dfb88beaef6632)
diff --git a/src/ast/ast-expression-visitor.cc b/src/ast/ast-expression-visitor.cc
index 6b2550c..dbf4ea4 100644
--- a/src/ast/ast-expression-visitor.cc
+++ b/src/ast/ast-expression-visitor.cc
@@ -208,6 +208,7 @@
 
 
 void AstExpressionVisitor::VisitDoExpression(DoExpression* expr) {
+  VisitExpression(expr);
   RECURSE(VisitBlock(expr->block()));
   RECURSE(VisitVariableProxy(expr->result()));
 }
@@ -399,8 +400,8 @@
 }
 
 
-void AstExpressionVisitor::VisitRewritableAssignmentExpression(
-    RewritableAssignmentExpression* expr) {
+void AstExpressionVisitor::VisitRewritableExpression(
+    RewritableExpression* expr) {
   VisitExpression(expr);
   RECURSE(Visit(expr->expression()));
 }