added libps.so, added stub for GetUserName

impl/getusername.cpp

@@ -0,0 +1,8 @@
+#include "getusername.h"
+#include <unistd.h>
+
+BOOL GetUserName(WCHAR_T* userName, UINT32* maxLength)
+{
+	return 0;
+}
+

impl/getusername.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include "pal.h"
+
+PAL_BEGIN_EXTERNC
+
+BOOL GetUserName(WCHAR_T* userName, UINT32* maxLength);
+
+PAL_END_EXTERNC
+

impl/pal.h

@@ -51,7 +51,9 @@
     #define WIN32_FROM_HRESULT(hr) hr
     #define HRESULT_FROM_WIN32(error) error
     typedef unsigned long DWORD, *LPDWORD;
-    typedef int BOOL;
+    typedef char BOOL;
+	typedef unsigned short WCHAR_T;
+	typedef unsigned int UINT32;
     typedef unsigned long HRESULT;
     typedef const wchar_t *PCWSTR;
     typedef wchar_t *PWSTR;