adb: replace utimes() with utime()

Fix the win_sdk host build by replacing utimes() with utime().  utime()
is functionally equivalent to utimes() when dealing with non-fractional
second timestamps, and is supported by the Windows CRT.

(The Windows CRT uses the nonstandard name _utime(), but mingw creates
aliases to the POSIX names.)

Change-Id: I513c6c5de05376c34cbb0894a94259acba8ae6f1