add make, cp, rm, ls, sh to windows

setup/cmdline.bat

@@ -1,4 +1,5 @@
 @for /f %%i in ('cd') do @path %path%;%%i\bin
+@for /f %%i in ('cd') do @set PREFIX=%%i
 
 @echo *******************************************************************************
 @echo *                              Welcome to amiga-gcc                           *
@@ -7,4 +8,4 @@
 
 m68k-amigaos-gcc hello.c -o hello -Os -noixemul
 
-@cmd /k
+@cmd /k

setup/make.bat

@@ -0,0 +1,3 @@
+@echo off
+_make SHELL=%PREFIX%/bin/sh.exe %*
+