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/Makefile b/Makefile
index 6ae9b24..4fb6ee0 100644
--- a/Makefile
+++ b/Makefile
@@ -251,7 +251,7 @@
 GYPFILES = third_party/icu/icu.gypi third_party/icu/icu.gyp \
 	   build/shim_headers.gypi build/features.gypi build/standalone.gypi \
 	   build/toolchain.gypi build/all.gyp build/mac/asan.gyp \
-	   test/cctest/cctest.gyp \
+	   test/cctest/cctest.gyp test/fuzzer/fuzzer.gyp \
 	   test/unittests/unittests.gyp tools/gyp/v8.gyp \
 	   tools/parser-shell.gyp testing/gmock.gyp testing/gtest.gyp \
 	   buildtools/third_party/libc++abi/libc++abi.gyp \