update checkers to use the new syntastic#makeprg#build()

Make all the easy updates. There are still quite a few to do, but in
doing these ones I can see that syntastic#makeprg#build() needs to
accept a few more options. Namely:

* "postargs" that appear after the filename
* "tail" that appears after everything - used for things like
  redirecting output and piping to grep/sed/etc
* the filename itself - only the java checkers needed this since they
  specify the directory of the file to check as well

There are still a few other things to do as well:

* remove the options from the checkers that are now provided by
  syntastic#makeprg#build implicitly - i.e. the checker exe and args.
* also, we need to doc the above implicit checker options