gdb: Prevent wrapping when writing to .segments.tmp

gdb: Prevent wrapping when writing to .segments.tmp

GDB logging is redirected to write .segments.tmp, which means that GDB
will wrap lines longer than what it thinks is the screen width
(typically 80 characters). When wrapping does occur it causes gmodule.pl
to misbehave. So disable line wrapping by using GDB's "with" command so
that its guaranteed to return the width to the previous value upon
command completion.

Also disable command tracing when dumping the module sections because that
output will go to .segments.tmp and thus cause gmodule.pl to misbehave.

Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>