Separate out files which get compiled depending on --enable-sim-common configuration.
so that targ-vals.h will be used instead of syscall.h. * simops.c: Use targ-vals.h instead of syscall.h. (OP_F020): Disable unsupported system calls.
scheme which is more compatible with WinGDB builds. * configure.in: Improve comment on how to run autoconf. * configure: Re-run autoconf to get new ../common/aclocal.m4. * Makefile.in: Use autoconf substitution to install common makefile fragment.