Switch over to rpmalloc instead of jemalloc.

rpmalloc is currently very aggressively configured which causes
significant reductions in resident memory over jemalloc.

In Bayonetta's title screen it went from 963MB down to 834MB resident.

Source/Tools/FEXOfflineCompiler/Main.cpp

@@ -154,8 +154,9 @@ GenerateSingleCache(const FEXCore::ExecutableFileInfo& Binary, fextl::set<uintpt
   }
 
   if (!Is64Bit) {
+    const auto PageSize = sysconf(_SC_PAGESIZE);
     // Block upper address space
-    FEXCore::Allocator::SetupHooks();
+    FEXCore::Allocator::SetupHooks(PageSize > 0 ? PageSize : FEXCore::Utils::FEX_PAGE_SIZE);
   }
 
   auto Thread = SetupCompileThread(*CTX, Is64Bit);