#2754 need postgis_sfcgal wrapped as an extension - patch provided by Vincent Mora (vmo)

git-svn-id: http://svn.osgeo.org/postgis/trunk@12689 b70326c6-7e19-0410-871a-916f4a2858ee
#2754 postgis_sfcgal extension oops missed new extension folder

git-svn-id: http://svn.osgeo.org/postgis/trunk@12690 b70326c6-7e19-0410-871a-916f4a2858ee
Add Vincent Mora to credits

git-svn-id: http://svn.osgeo.org/postgis/trunk@12691 b70326c6-7e19-0410-871a-916f4a2858ee