[eacsl] Add test for `--dlmalloc-from-sources`

src/plugins/e-acsl/tests/special/e-acsl-compile-dlmalloc.c

+/* run.config_ci, run.config_dev
+  COMMENT: Compile dlmalloc from sources with this file
+  MACRO: ROOT_EACSL_GCC_OPTS_EXT --dlmalloc-from-sources
+ */
+int main() {
+  return 0;
+}
\ No newline at end of file

src/plugins/e-acsl/tests/special/oracle_ci/e-acsl-compile-dlmalloc.res.oracle

+[e-acsl] beginning translation.
+[e-acsl] translation done in project "e-acsl".

src/plugins/e-acsl/tests/special/oracle_ci/gen_e-acsl-compile-dlmalloc.c

+/* Generated by Frama-C */
+#include "stddef.h"
+#include "stdio.h"
+int main(void)
+{
+  int __retres;
+  __retres = 0;
+  return __retres;
+}
+
+