* configure, configure.in: Allow gdbserver to be configured
for cross-target environments.
* gdbserver/Makefile.in: Add simulator support.
* gdbserver/configure.in: Eliminate assumption that host == target.
Simplify using gdb/configure.tgt and gdb/configure.host.
Fix other minor configuration errors.
* gdbserver/low-sparc.c: Fix compile error.
* gdbserver/remote-utils.c: Eliminate assumption that registers
and addresses are four bytes. Fix minor compile errors and warnings.
* gdbserver/server.c: Rewrite numerous instances of identical code
for starting inferior processes to call new function start_inferior.
Eliminate assumption that registers and addresses are four bytes.
* gdbserver/server.h: Add missing prototypes to eliminate compiler
warnings.
* gdbserver/low-sim.c: New file to mate gdbserver with simulators.
* config/mips/vr5000.mt: Add Vr5000 simulator support to gdbserver.
* config/i386/linux.mh: Eliminate gdbserver support as a first step
in moving such support from host to target makefile fragments.
* config/i386/linux.mt: Move gdbserver support here from linux.mh.
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