[lldb] Fix typo in ProcessWindows.h

(cherry picked from commit 530bc61)

Author: JDevlieghere

lldb/source/Plugins/Process/Windows/Common/ProcessWindows.h

@@ -73,7 +73,7 @@ class ProcessWindows : public Process, public ProcessDebugger {
                           ThreadList &new_thread_list) override;
   bool IsAlive() override;
 
-  ArchSpec GetSystemArchitecture override();
+  ArchSpec GetSystemArchitecture() override;
 
   size_t DoReadMemory(lldb::addr_t vm_addr, void *buf, size_t size,
                       Status &error) override;