A few typo fixes in the converter script.

tools/ac_converter.py

@@ -202,7 +202,7 @@ function_data = \
      'HAVE_DIRFD': ('dirfd', 'dirent.h'),
      'HAVE_DLOPEN': ('dlopen', 'dlfcn.h'),
      'HAVE_DUP2': ('dup2', 'unistd.h'),
-     'HAVE_DUP3': ('dup2', 'unistd.h'),
+     'HAVE_DUP3': ('dup3', 'unistd.h'),
      'HAVE_EPOLL_CREATE1': ('epoll_create1', 'sys/epoll.h'),
      'HAVE_ERF': ('erf', 'math.h'),
      'HAVE_ERFC': ('erfc', 'math.h'),
@@ -222,7 +222,7 @@ function_data = \
      'HAVE_FTIME': ('ftime', 'sys/timeb.h'),
      'HAVE_FTRUNCATE': ('ftruncate', 'unistd.h'),
      'HAVE_FUTIMENS': ('futimens', 'sys/stat.h'),
-     'HAVE_FUTIMES': ('futimes', 'sys/stat.h'),
+     'HAVE_FUTIMES': ('futimes', 'sys/time.h'),
      'HAVE_GAI_STRERROR': ('gai_strerror', 'netdb.h'),
      'HAVE_GETGROUPLIST': ('getgrouplist', 'grp.h'),
      'HAVE_GETHOSTBYNAME': ('gethostbyname', 'netdb.h'),