* Makefile.in (infrun.o): Add $(language_h)

* Makefile.in (infrun.o): Add $(language_h)
* infrun.c (handle_inferior_event): Use skip_language_trampoline
for language specific trampolines.
* language.h (struct language_defn): Add skip_trampoline.
(skip_language_trampoline): Declare.
* language.c (unk_lang_trampoline, skip_language_trampoline):
New functions.
(unknown_language_defn, auto_language_defn, local_language_defn):
Add ukn_lang_trampoline.
* ada-lang.c (ada_language_defn): Add NULL for language
specific skip_trampoline.
* c-lang.c, f-lang.c, jv-lang.c, m2-lang.c, p-lang.c,
scm-lang.c: Likewise.
* objc-lang.c (objc_skip_trampoline): New function.
(objc_language_defn): Add objc_skip_trampoline.