Fix .gir file dependencies
Fix .gir file dependencies

Ensure introspect is built before g-ir-scanner tries to run it.  Fixes
build failures with highly parallel builds:

    Traceback (most recent call last):
      File "/usr/bin/g-ir-scanner", line 55, in <module>
        sys.exit(scanner_main(sys.argv))
      File "/usr/lib64/gobject-introspection/giscanner/scannermain.py", line 526, in scanner_main
        shlibs = create_binary(transformer, options, args)
      File "/usr/lib64/gobject-introspection/giscanner/scannermain.py", line 410, in create_binary
        gdump_parser.parse()
      File "/usr/lib64/gobject-introspection/giscanner/gdumpparser.py", line 110, in parse
        tree = self._execute_binary_get_tree()
      File "/usr/lib64/gobject-introspection/giscanner/gdumpparser.py", line 167, in _execute_binary_get_tree
        subprocess.check_call(args, stdout=sys.stdout, stderr=sys.stderr)
      File "/usr/lib64/python2.7/subprocess.py", line 535, in check_call
        retcode = call(*popenargs, **kwargs)
      File "/usr/lib64/python2.7/subprocess.py", line 522, in call
        return Popen(*popenargs, **kwargs).wait()
      File "/usr/lib64/python2.7/subprocess.py", line 710, in __init__
        errread, errwrite)
      File "/usr/lib64/python2.7/subprocess.py", line 1327, in _execute_child
        raise child_exception
    OSError: [Errno 2] No such file or directory

leiyangyou/libvips,mcanthony/libvips,leiyangyou/libvips,jcupitt/libvips,mcanthony/libvips,jcupitt/libvips,mcanthony/libvips,jcupitt/libvips,jcupitt/libvips,mcanthony/libvips,lovell/libvips,lovell/libvips,leiyangyou/libvips,lovell/libvips,lovell/libvips,leiyangyou/libvips