torture: Convert parse-console.sh to mktemp

This commit does the long-overdue conversion of the parse-console.sh
file to use mktemp to create its temporary directory.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>

tools/testing/selftests/rcutorture/bin/parse-console.sh

@@ -11,7 +11,7 @@
 #
 # Authors: Paul E. McKenney <paulmck@linux.ibm.com>
 
-T=${TMPDIR-/tmp}/parse-console.sh.$$
+T="`mktemp -d ${TMPDIR-/tmp}/parse-console.sh.XXXXXX`"
 file="$1"
 title="$2"