Fix Windows RC icon path and remove stray include in warden_module

Copy Wowee.ico into the build tree at configure time so llvm-rc can
resolve the relative assets\\wowee.ico path in wowee.rc. Also remove a
redundant #include <sys/mman.h> that was incorrectly placed inside a
function body.

src/game/warden_module.cpp

@@ -494,7 +494,6 @@ bool WardenModule::parseExecutableFormat(const std::vector<uint8_t>& exeData) {
             return false;
         }
     #else
-        #include <sys/mman.h>
         moduleMemory_ = mmap(
             nullptr,
             finalCodeSize,