update oracles

src/plugins/e-acsl/tests/bts/oracle/bts2252.res.oracle

-tests/bts/bts2252.c:22:[kernel] warning: Calling undeclared function strncpy. Old style K&R code?
+tests/bts/bts2252.c:22:[kernel:typing:implicit-function-declaration] warning: Calling undeclared function strncpy. Old style K&R code?
 [e-acsl] beginning translation.
 tests/bts/bts2252.c:22:[kernel] warning: Neither code nor specification for function strncpy, generating default assigns from the prototype
 [e-acsl] translation done in project "e-acsl".

src/plugins/e-acsl/tests/format/oracle/fprintf.res.oracle

-tests/format/fprintf.c:15:[kernel] warning: Calling undeclared function fork. Old style K&R code?
+tests/format/fprintf.c:15:[kernel:typing:implicit-function-declaration] warning: Calling undeclared function fork. Old style K&R code?
 tests/format/fprintf.c:22:[kernel:typing:incompatible-types-call] warning: expected 'FILE *' but got argument of type 'int *': & argc
 [e-acsl] beginning translation.
 [e-acsl] warning: annotating undefined function `exit':

src/plugins/e-acsl/tests/runtime/oracle/hidden_malloc.res.oracle

-tests/runtime/hidden_malloc.c:11:[kernel] warning: Calling undeclared function realpath. Old style K&R code?
+tests/runtime/hidden_malloc.c:11:[kernel:typing:implicit-function-declaration] warning: Calling undeclared function realpath. Old style K&R code?
 [e-acsl] beginning translation.
 tests/runtime/hidden_malloc.c:11:[kernel] warning: Neither code nor specification for function realpath, generating default assigns from the prototype
 [e-acsl] translation done in project "e-acsl".

src/plugins/e-acsl/tests/temporal/oracle/t_fun_lib.res.oracle

-tests/temporal/t_fun_lib.c:20:[kernel] warning: Calling undeclared function realpath. Old style K&R code?
+tests/temporal/t_fun_lib.c:20:[kernel:typing:implicit-function-declaration] warning: Calling undeclared function realpath. Old style K&R code?
 [e-acsl] beginning translation.
 tests/temporal/t_fun_lib.c:20:[kernel] warning: Neither code nor specification for function realpath, generating default assigns from the prototype
 [e-acsl] translation done in project "e-acsl".