fs/procfs:  Process status now includes task flags.  Some strings modified to improved 'ps' command output

sched/pthread/: CRITICAL BUGFIX: Logic was wiping out the indication that of the type of a pthread.  Hence, it could be confused as a task.  Found because this was causing a crash when /proc/nnn/cmdline was printed.

net/: Move net_procfs.c to net/procfs/.  Partition logic a little better to make space to support net device procfs as well

include/nuttx/net/netdev.h and several Ethernet drivers in arch/:  Most network drivers to not support statistics.  Those that do only support them when DEBUG is enabled.  Each driver collects an architecture specific set of statistics and there is no mechanism in place to view those statistics.  Thus, the driver feature was mostly useless.  This change standardizes the driver statistics and puts the definition in the common network device structure defined in netdev.h where they can be accessed by network applications.  All Ethernet drivers that collect statistics have been adapted to use these common statistics.

drivers/mtd/mtd/mtd_procfs/c and include/nuttx/mtd/mtd.h:  Add an interface to un-regiser an MTD procfs entry.
drivers/mtd/filemtd.c:  New new MTD conversion layer that will convert a regular file (or driver file) to an MTD device.  This is useful for testing on the simulation using the hostfs.

From Ken Petit

drivers/lcd/ili9432.c:  Fixed errors in orientation. Portrait, RPortrait, and RLandscript should work correly now.  They were displayed mirrored.  From  Marco Krahl

Fix some conditional compilation.  CONFIG_LIBC_LOCALTIME should be checked in most of the same places wehre CONFIG_TIME_EXTENDED is checked

fs/hostfs: Add a special file system for use with simulator that supports access to the host file system from the simulation.  From Ken Petit

size_t should be 64-bits on a 64-bit machine. mmsize_t should be 32-bits (unless CONFIG_MM_SMALL is selected).  This commit backs out the last change to stddef.h