[CRIU] [PATCH 0/15] clean up headers (v2)

[Andrey Vagin]

You don't care about headers, because you don't try to
build CRIU on Rpi;).

This series removes restorer.h from unrelated files, restorer.h
includes too many other headers, so we should avoid its inclusion.

The main idea of this series is that all headers should be categorized
* compiler.h, types.h, ...
* list.h, lock.h, ...
* util.h, log.h, ...
* vdso.h, files.h, ...
* crtools.h

A header can include only headers from upper levels.

v2: add servicefd.h and vma.h
    split crtools.h

Here are two output if vdso.h is changed.
Without this patches:
  CC       parasite-syscall.o
  CC       cr-restore.o
  CC       security.o
  CC       proc_parse.o
  CC       cr-dump.o
  CC       cr-check.o
  CC       ptrace.o
  CC       shmem.o
  CC       eventfd.o
  CC       eventpoll.o
  CC       mount.o
  CC       fsnotify.o
  CC       signalfd.o
  CC       pstree.o
  CC       tty.o
  CC       sigframe.o
  CC       arch/x86/vdso.o
  LINK     built-in.o

With this patches
  CC       parasite-syscall.o
  CC       cr-restore.o
  CC       proc_parse.o
  CC       cr-dump.o
  CC       pstree.o
  CC       arch/x86/vdso.o
  LINK     built-in.o