[PATCH][gdb/testsuite] Clean up stale exec in gdb_compile_pascal

[Tom Tromey]

>>>>> "Tom" == Tom de Vries <tdevries@suse.de> writes:

Tom> 2019-08-16  Tom de Vries  <tdevries@suse.de>

Tom> 	* lib/pascal.exp (gdb_compile_pascal): Remove $destfile before
Tom> 	compilation.

This code is already a little weird, because gpc_compile uses
"remote_exec host", but then the code checks for file existence on the
machine where dejagnu is being run.

However, your patch doesn't make this any worse, so it is ok.
Thanks.

Tom