target: less implicit inclusion of "command.h"

Lots of files still include it, often through needless
duplicate inclusion of "log.h"; sigh.

This cleans up the inclusion graph a bunch, so there are
fewer inclusion paths, but it doesn't change much otherwise.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

src/target/arm_simulator.c

@@ -27,7 +27,6 @@
 #include "armv4_5.h"
 #include "arm_disassembler.h"
 #include "arm_simulator.h"
-#include "log.h"
 #include "binarybuffer.h"