Estimated hours taken: 0.75
Added some tests for the cases where there are both clauses and
pragma(c_code, ...) decs. for the same pred.
pragma_c_code_and_clauses1.m:
Test for case where a clause precedes a pragma(c_code, ...) dec.
pragma_c_code_and_clauses2.m:
Test for case where a pragma(c_code, ...) dec precedes a clause.