CRLF line terminators are not supported

[Po Hu]

For the case in kati/testcase/crlf.mk, if "\r\n" is assigned in more than 1 lines, for example:
PASS :=
PASS
PASS

ckati still fails:
echo PASS
PASS
PASS
/bin/sh: PASS: command not found
*** [test] Error 127

while make 3.8.1 has no error:
echo PASS PASS
PASS PASS