libproj: added ntf_r93.gsb (trac https://trac.osgeo.org/grass/ticket/1219) and null.lla unless trac https://trac.osgeo.org/grass/ticket/2456 is solved

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@68654 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/proj/null.lla

@@ -0,0 +1,5 @@
+Null transform for whole world
+   3   3   1  -180.00000   180.00000   -90.00000   90.00000
+0: 0 0 0 0 0 0 
+1: 0 0 0 0 0 0 
+2: 0 0 0 0 0 0