UseSWIG: Fix check for noproxy flag (#14990)

The check for this flag added by commit v3.0.0-rc1~284^2 (UseSWIG: Name
python module according to swig flags, 2013-11-26) can get false
positives on flags like "-noproxydel".  Improve the check to match only
"-noproxy".

Suggested-by: Garth Wells <gnw20@cam.ac.uk>
Merge topic 'UseSWIG-fix-noproxy-check' into next

ae8498d9 UseSWIG: Fix check for noproxy flag (#14990)
UseSWIG: Fix check for noproxy flag (#14990)

The check for this flag added by commit v3.0.0-rc1~284^2 (UseSWIG: Name
python module according to swig flags, 2013-11-26) can get false
positives on flags like "-noproxydel".  Improve the check to match only
"-noproxy".

Suggested-by: Garth Wells <gnw20@cam.ac.uk>
Merge topic 'UseSWIG-fix-noproxy-check' into next

e932ac9c UseSWIG: Fix check for noproxy flag (#14990)