[NF] Initial support for function vectorization.

  - Implemented function vectorization.
  - Improved mapping function implementations.
  - Lots of changes to function handling in general. See diffs.
  - Other minor fixes.

Belonging to [master]:
  - #2278
  - OpenModelica/OpenModelica-testsuite#877

Author: mahge

Compiler/NFFrontEnd/NFBuiltinFuncs.mo

@@ -169,5 +169,9 @@ constant Function CAT = Function.FUNCTION(Path.IDENT("cat"),
   InstNode.EMPTY_NODE(), {}, {}, {}, {},
     Type.UNKNOWN(), DAE.FUNCTION_ATTRIBUTES_BUILTIN, Pointer.createImmutable(true));
 
+constant Function ARRAY_FUNC = Function.FUNCTION(Path.IDENT("array"),
+  InstNode.EMPTY_NODE(), {}, {}, {}, {},
+    Type.UNKNOWN(), DAE.FUNCTION_ATTRIBUTES_BUILTIN, Pointer.createImmutable(true));
+
 annotation(__OpenModelica_Interface="frontend");
 end NFBuiltinFuncs;