[tests] fixes expected exit status in tests

tests/pp/baddirective.cpp

tests/pp/baddirective2.cpp

tests/pp/comment.cpp

tests/pp/define.cpp

tests/pp/define2.cpp

tests/pp/empty.cpp

tests/pp/empty2.cpp

tests/pp/empty3.cpp

tests/pp/oracle/baddirective.err.oracle

tests/pp/oracle/baddirective2.err.oracle

tests/pp/oracle/comment.err.oracle

tests/pp/oracle/define.err.oracle

tests/pp/oracle/define2.err.oracle

tests/pp/oracle/empty.err.oracle

tests/pp/oracle/empty2.err.oracle

tests/pp/oracle/empty3.err.oracle

tests/pp/oracle/pragma.err.oracle

tests/pp/oracle/valid_function1.res.oracle

tests/pp/oracle/valid_function2.res.oracle

tests/pp/pragma.cpp