Fix mips-elf --enable-libmudflap make -j2 failure.

* Makefile.def (lang_env_dependencies): Add libmudflap.
* Makefile.in: Regenerate.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@104974 138bc75d-0d04-0410-961f-82ee72b054a4