8230728: Thin stroked shapes are not rendered if affine transform has flip bit
Summary: use abs(at.getDeterminant()) in userSpaceLineWidth() to ensure positive value
Reviewed-by: prr, jdv
^build/
^dist/
^.idea/
nbproject/private/
^webrev
^.src-rev$
^.jib/
(^|/)\.DS_Store
(^|/)\.metadata/
(^|/)\.recommenders/
test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
(^|/)JTreport/
(^|/)JTwork/
(^|/)\.git/
^src/utils/hsdis/build/