bug#9319: Compilation fontification regression

[Juri Linkov]

1. Comparing etc/compilation.txt in side-by-side frames
   with versions 23.1 and 24.0 (current Bzr trunk)
   reveals the regression in fontification
   of some compilation error/warning messages.
   I see differences in the following sections:

* IBM jikes, Sparc Pascal, GCOV, Podchecker
  - errors/warnings not highlighted,
    so this looks like a bug.

* ant
  - warning highlighted with `error' face.  But maybe this change
    is based on the user's request, I don't know.

Other changes between 23.1 and 24.0 look like bug fixes
that provide more correct fontification.

2. Sometimes errors/warnings are not fontified at all.
   For instance,

   C-x C-f etc/compilation.txt RET
   C-s RET symbol: sun RET

i.e. non-incremental search that goes directly to the given section,
fontifies nothing.

But scrolling slowly with C-v from the beginning of the
etc/compilation.txt buffer, fontifies everything.