buildconf.bat: Avoid using goto for file not in repository

:start

  rem create tool_hugehelp.c

if not exist src\tool_hugehelp.c.cvs goto end_hugehelp_c

  if exist src\tool_hugehelp.c.cvs (

    copy /Y src\tool_hugehelp.c.cvs src\tool_hugehelp.c

:end_hugehelp_c

  )

  rem create Makefile

if not exist Makefile.dist goto end_makefile

  if exist Makefile.dist (

    copy /Y Makefile.dist Makefile

:end_makefile

  )

  rem create curlbuild.h

if not exist include\curl\curlbuild.h.dist goto end_curlbuild_h

  if exist include\curl\curlbuild.h.dist (

    copy /Y include\curl\curlbuild.h.dist include\curl\curlbuild.h

:end_curlbuild_h

  )

  rem setup c-ares git tree

if not exist ares\buildconf.bat goto end_c_ares

  if exist ares\buildconf.bat (

    cd ares

    call buildconf.bat

    cd ..

:end_c_ares

  )

  goto success

:syntax