doc: misplaced sections about Emacs Lisp, Java, Python

[Bruno Haible]

Hi,

In the Automake documentation, the sections "Emacs Lisp", "Java", "Python"
are in a chapter "Other GNU Tools", two chapters away from the sections
"C++ support", "Objective C Support", "Assembly Support", "Java Support".
It is somewhat confusing.

Suggestion:
  - Move the sections "Emacs Lisp", "Python" to the chapter
    "Building Programs and Libraries".
  - Combine the section "Java" with the section "Java Support", possibly
    in two subsections, inside the chapter "Building Programs and Libraries".

Bruno