[tests] cherry-picked hack for fopen

src/plugins/e-acsl/doc/Changelog

src/plugins/e-acsl/main.ml

src/plugins/e-acsl/tests/bts/oracle/bts1304.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1304.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1304.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1307.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1307.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1307.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1324.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1324.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1324.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1326.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1326.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1326.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1390.0.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1390.1.res.oracle

src/plugins/e-acsl/tests/bts/oracle/bts1390.res.oracle

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/bts1398.res.oracle