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/ppc/codegen-ppc.cc b/src/ppc/codegen-ppc.cc
index 2bf8b4e..d6d86b0 100644
--- a/src/ppc/codegen-ppc.cc
+++ b/src/ppc/codegen-ppc.cc
@@ -58,9 +58,7 @@
 
   CodeDesc desc;
   masm.GetCode(&desc);
-#if !ABI_USES_FUNCTION_DESCRIPTORS
-  DCHECK(!RelocInfo::RequiresRelocation(desc));
-#endif
+  DCHECK(ABI_USES_FUNCTION_DESCRIPTORS || !RelocInfo::RequiresRelocation(desc));
 
   Assembler::FlushICache(isolate, buffer, actual_size);
   base::OS::ProtectCode(buffer, actual_size);
@@ -96,9 +94,7 @@
 
   CodeDesc desc;
   masm.GetCode(&desc);
-#if !ABI_USES_FUNCTION_DESCRIPTORS
-  DCHECK(!RelocInfo::RequiresRelocation(desc));
-#endif
+  DCHECK(ABI_USES_FUNCTION_DESCRIPTORS || !RelocInfo::RequiresRelocation(desc));
 
   Assembler::FlushICache(isolate, buffer, actual_size);
   base::OS::ProtectCode(buffer, actual_size);