RFR(XS): 8244756: Build broken with some awk version after JDK-8244248

[Doerr, Martin]

Hi Magnus,

thank you for proposing a fix which allows building with old awk on AIX. Works 
fine.

Here's the webrev:
http://cr.openjdk.java.net/~mdoerr/8244756_AIX_fix_awk_expr/webrev.00/

Would you like to be mentioned as author?

Best regards,
Martin