selftests/lkdtm: Use grep -E instead of egrep

# Figure out which test to run from our script name.

test=$(basename $0 .sh)

# Look up details about the test from master list of LKDTM tests.

line=$(egrep '^#?'"$test"'\b' tests.txt)

line=$(grep -E '^#?'"$test"'\b' tests.txt)

if [ -z "$line" ]; then

	echo "Skipped: missing test '$test' in tests.txt"

	exit $KSELFTEST_SKIP_TEST

fi

# Check that the test is known to LKDTM.

if ! egrep -q '^'"$test"'$' "$TRIGGER" ; then

if ! grep -E -q '^'"$test"'$' "$TRIGGER" ; then

	echo "Skipped: test '$test' missing in $TRIGGER!"

	exit $KSELFTEST_SKIP_TEST

fi

cat "$LOG"

# Check for expected output

if egrep -qi "$expect" "$LOG" ; then

if grep -E -qi "$expect" "$LOG" ; then

	echo "$test: saw '$expect': ok"

	exit 0

else

	if egrep -qi XFAIL: "$LOG" ; then

	if grep -E -qi XFAIL: "$LOG" ; then

		echo "$test: saw 'XFAIL': [SKIP]"

		exit $KSELFTEST_SKIP_TEST

	else