build: auto-generate syntax lists

Changes:

* Use the commands from contrib/vim/syntax/firejail.vim to create
  makefile targets to generate syntax lists in contrib/syntax/lists
* Add contrib/syntax/files/example.in as an example of how to generate
  syntax files
* Generate and add the syntax lists, to make it easier to spot if they
  are properly updated when a new command is added or if their recipes
  also need changes
* Add "syntax" and "contrib" makefile targets

Note: The generation commands are executed mostly silently to avoid
generating too much noise when also making other targets.

Note2: In some generation commands, a `$$` escape is used to pass `$` to
the shell, to avoid being interpreted by make as the start of a macro.

Note3: `@make_input@` is used in example.in to make it clear that the
file is generated (and that it is generated by make rather than
configure), similarly to how `@configure_input@` is used in configure
input files.  See also apparmor.vim:

    $ head -n 2 /usr/share/vim/vimfiles/syntax/apparmor.vim
    " generated from apparmor.vim.in by create-apparmor.vim.py
    " do not edit this file - edit apparmor.vim.in or create-apparmor.vim.py instead

Environment: apparmor 3.1.2-1 on Artix Linux.

Relates to #2679 #5502 #5577 #5612.

1 files changed, 135 insertions, 0 deletions

diff --git a/contrib/syntax/lists/system_errnos.list b/contrib/syntax/lists/system_errnos.list
new file mode 100644
index 000000000..f0f816943
--- /dev/null
+++ b/contrib/syntax/lists/system_errnos.list
@@ -0,0 +1,135 @@
+E2BIG
+EACCES
+EADDRINUSE
+EADDRNOTAVAIL
+EADV
+EAFNOSUPPORT
+EAGAIN
+EALREADY
+EBADE
+EBADF
+EBADFD
+EBADMSG
+EBADR
+EBADRQC
+EBADSLT
+EBFONT
+EBUSY
+ECANCELED
+ECHILD
+ECHRNG
+ECOMM
+ECONNABORTED
+ECONNREFUSED
+ECONNRESET
+EDEADLK
+EDEADLOCK
+EDESTADDRREQ
+EDOM
+EDOTDOT
+EDQUOT
+EEXIST
+EFAULT
+EFBIG
+EHOSTDOWN
+EHOSTUNREACH
+EHWPOISON
+EIDRM
+EILSEQ
+EINPROGRESS
+EINTR
+EINVAL
+EIO
+EISCONN
+EISDIR
+EISNAM
+EKEYEXPIRED
+EKEYREJECTED
+EKEYREVOKED
+EL2HLT
+EL2NSYNC
+EL3HLT
+EL3RST
+ELIBACC
+ELIBBAD
+ELIBEXEC
+ELIBMAX
+ELIBSCN
+ELNRNG
+ELOOP
+EMEDIUMTYPE
+EMFILE
+EMLINK
+EMSGSIZE
+EMULTIHOP
+ENAMETOOLONG
+ENAVAIL
+ENETDOWN
+ENETRESET
+ENETUNREACH
+ENFILE
+ENOANO
+ENOATTR
+ENOBUFS
+ENOCSI
+ENODATA
+ENODEV
+ENOENT
+ENOEXEC
+ENOKEY
+ENOLCK
+ENOLINK
+ENOMEDIUM
+ENOMEM
+ENOMSG
+ENONET
+ENOPKG
+ENOPROTOOPT
+ENOSPC
+ENOSR
+ENOSTR
+ENOSYS
+ENOTBLK
+ENOTCONN
+ENOTDIR
+ENOTEMPTY
+ENOTNAM
+ENOTRECOVERABLE
+ENOTSOCK
+ENOTSUP
+ENOTTY
+ENOTUNIQ
+ENXIO
+EOPNOTSUPP
+EOVERFLOW
+EOWNERDEAD
+EPERM
+EPFNOSUPPORT
+EPIPE
+EPROTO
+EPROTONOSUPPORT
+EPROTOTYPE
+ERANGE
+EREMCHG
+EREMOTE
+EREMOTEIO
+ERESTART
+ERFKILL
+EROFS
+ESHUTDOWN
+ESOCKTNOSUPPORT
+ESPIPE
+ESRCH
+ESRMNT
+ESTALE
+ESTRPIPE
+ETIME
+ETIMEDOUT
+ETOOMANYREFS
+ETXTBSY
+EUCLEAN
+EUNATCH
+EUSERS
+EWOULDBLOCK
+EXDEV
+EXFULL