[foreign] RFR 8212182: HelpFlagsTest fails because of lack of jextract support

[Maurizio Cimadamore]

Hi,
this patch fixes a test failure due to the lack of a profile for the 
jextract tool.

(another option to fix this would be to exclude jextract from the test 
entirely...)

Webrev:

http://cr.openjdk.java.net/~mcimadamore/panama/8212182/

Cheers
Maurizio