adds deps to some tests

tests/cil/cpu_a.c

tests/cil/merge.c

tests/cil/merge2.c

tests/idct/ieee_1180_1990.c

tests/spec/first.c

tests/spec/merge_logic_globals_1.c

tests/spec/model1.c

tests/spec/multiple_decl_def_1.c

tests/spec/multiple_file_1.c

tests/spec/multiple_include_2.c

tests/spec/preprocess.c

tests/spec/source_annot.c

tests/spec/use.c

tests/spec/volatile.c