Code generation for arrays of records

[Martin Sjölund]

We need to add support for arrays of records in function context
Currently our code looks something like:

struct Complex_array _t;
alloc_struct Complex_array(&_t, 1, (modelica_integer) 2);

This needs to be something like...

struct_array _t;
alloc_struct_array(&t, sizeof(struct Complex), 1, 2);