Handle FUSE_FSYNCDIR as FUSE_FSYNC

There have been issues with sdcard data corruption even after
successfully calling fsync for /sdcard. This is caused by
the sdcard daemon doing nothing in this case.

Change-Id: I48149ceabdac79ac535b35c2598bb1fbb5410883
Fix sdcard's FUSE_FSYNCDIR handling.

For a file the FUSE fh is a struct handle containing an int fd;
for a directory it's a struct dirhandle containing a DIR*. Fix
handle_fsync to extract the file descriptor appropriately in
both cases.

Bug: 14613980
Change-Id: I45515cff6638e27a99b849e6fc639d355dbb4d27
Make sdcard log to the log rather than stderr.

Change-Id: I9c78941184c5e364055bfac766e1e542d3c23c87

Conflicts:
	sdcard/sdcard.c