[tests] updated wrt libc changes

src/plugins/e-acsl/tests/bts/oracle/bts1398.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1398.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/gen_bts1398.c

src/plugins/e-acsl/tests/bts/oracle/gen_bts13982.c

src/plugins/e-acsl/tests/e-acsl-runtime/oracle/gen_stdout.c

src/plugins/e-acsl/tests/e-acsl-runtime/oracle/gen_stdout2.c

...ns/e-acsl/tests/e-acsl-runtime/oracle/stdout.0.res.oracle

...ns/e-acsl/tests/e-acsl-runtime/oracle/stdout.1.res.oracle