Revert "Revert "Upgrade to 5.0.71.48""

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

Change-Id: Ib83e35bfbae6af627451c926a9650ec57c045605
diff --git a/test/fuzzer/regexp/test03 b/test/fuzzer/regexp/test03
new file mode 100644
index 0000000..da14770
--- /dev/null
+++ b/test/fuzzer/regexp/test03
@@ -0,0 +1 @@
+[^]