update SHA to HEAD
disable Werror temporarily
use system includes -isystem to avoid warnings on external

includes, needed for Werror
Revert "disable Werror temporarily"

This reverts commit 65812579d897abf744df49ca06fc6a73e4a85b7c.
parse NTA_INCLUDEFLAGS for swig, avoid -isystem

use string replace and change -isystem -> -I type of includes,
as swig can't handle -isystem
-isystem is required by C compilers to avoid warnings in external libs (because of Werror)
remove unused val htmtest (Werror)
Merge pull request #1 from breznak/tst

workarounds for linux