[LNT] Add cflags string argument to lnt

[Charlie Turner]

Hi,

 

The current behavior seems to only allow you to pass one cflag at a time to
the lnt script,

 

--cflag cf1

--cflag cf2

.

--cflag cfn

 

The attached patch adds an option that allows you to instead pass -cflags
"cf1 cf2 . cfn" to the lnt script.

 

Regards,

Charlie.

 

P.S. Chris, do you have Phabricator account? I was going to use the Phab
reviewing tool, but I could find your name in the reviewers list.

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