rcutorture: Simplify functions.sh include path

Inclusions of 'functions.sh' from 'kvm-test-1-run.sh' and
'kvm-recheck*.sh' use its absolute path.  Because the directory containing
'functions.sh' is already in PATH, the full path is unnecessary.  This
commit therefore simplifies the inclusions to use the short relative path.
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh

@@ -30,7 +30,7 @@ else
 	echo Unreadable results directory: $i
 	exit 1
 fi
-. tools/testing/selftests/rcutorture/bin/functions.sh
+. functions.sh
 
 configfile=`echo $i | sed -e 's/^.*\///'`
 ngps=`grep ver: $i/console.log 2> /dev/null | tail -1 | sed -e 's/^.* ver: //' -e 's/ .*$//'`

tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh

@@ -26,7 +26,7 @@
 # Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
 
 i="$1"
-. tools/testing/selftests/rcutorture/bin/functions.sh
+. functions.sh
 
 if test "`grep -c 'rcu_exp_grace_period.*start' < $i/console.log`" -lt 100
 then

tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh

@@ -31,7 +31,7 @@ else
 	exit 1
 fi
 PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH
-. tools/testing/selftests/rcutorture/bin/functions.sh
+. functions.sh
 
 if kvm-recheck-rcuperf-ftrace.sh $i
 then

tools/testing/selftests/rcutorture/bin/kvm-recheck.sh

@@ -25,7 +25,7 @@
 # Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
 
 PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH
-. tools/testing/selftests/rcutorture/bin/functions.sh
+. functions.sh
 for rd in "$@"
 do
 	firsttime=1

tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh

@@ -42,7 +42,7 @@ T=${TMPDIR-/tmp}/kvm-test-1-run.sh.$$
 trap 'rm -rf $T' 0
 mkdir $T
 
-. $KVM/bin/functions.sh
+. functions.sh
 . $CONFIGFRAG/ver_functions.sh
 
 config_template=${1}