Dealloc exec cache after sys_prx/overlay_unload_module

Must come before vm::dealloc of it.

rpcs3/Emu/Cell/PPUModule.cpp

@@ -1036,6 +1036,12 @@ void ppu_unload_prx(const lv2_prx& prx)
 
 	for (auto& seg : prx.segs)
 	{
+		if (seg.flags & 1)
+		{
+			// Segment was considered executable thus needing to free exec data
+			utils::memory_decommit(vm::g_exec_addr + size_t{seg.addr} * 2, size_t{seg.size} * 2);
+		}
+
 		vm::dealloc(seg.addr, vm::main);
 	}
 }