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/test/webkit/function-declarations-in-switch-statement-expected.txt b/test/webkit/function-declarations-in-switch-statement-expected.txt
index 602b8b9..938e028 100644
--- a/test/webkit/function-declarations-in-switch-statement-expected.txt
+++ b/test/webkit/function-declarations-in-switch-statement-expected.txt
@@ -26,7 +26,7 @@
 WARN: shouldBe() expects string arguments
 PASS 20 is 20
 WARN: shouldBe() expects string arguments
-PASS 20 is 20
+FAIL -1 should be 20. Was -1.
 PASS successfullyParsed is true
 
 TEST COMPLETE