Revert "adb: do not chown/chmod files pushed to sdcard"

This reverts commit cce64d4cb8c7ade0c8fc0ad654632a14a4229f2a.

Change-Id: I9c5d63a72501fc570e1a872807e4236de31f77a3
Fix "adb push /sdcard/filename"

Don't assume that calling chown(filename, getuid(), getgid())
will always succeed. In the case of /sdcard, a file you create
will be owned by root, so the chown call will fail.

Instead, use uid=gid=-1 so that the chown call is truly a no-op.

Ignore the results of calling chmod. Again, for /sdcard, the
chmod call will never succeed, because the file isn't owned by
the shell user.

Bug: 12441485
Change-Id: I11eaf1d6f6049c1158afc29754fbb7af2baf2c78
Merge remote-tracking branch 'CyanogenMod/cm-11.0' into cm-11.0