get_integer_valueof: Don't output value in test name

get_integer_valueof: Don't output value in test name

The get_integer_valueof outputs the value it has read as part of the
test name.  This causes test names to vary from run to run, and adds
some noise when diffing test results.  e.g.:

-PASS: gdb.threads/process-dies-while-detaching.exp: multi-process: continue: killed outside: get integer valueof "mypid" (28770)
+PASS: gdb.threads/process-dies-while-detaching.exp: multi-process: continue: killed outside: get integer valueof "mypid" (32238)

This patch removes that, since it's probably not very useful.

gdb/testsuite/ChangeLog:

	* lib/gdb.exp (get_integer_valueof): Don't output read value in test name.