Tidy up includes and copyright notices, fix indentation

The files not mentioned in changelog below had only
copyright notices fixes and indentation fixes.

* defs.h: Include <stdint.h> and <inttypes.h>.
* file.c: Do not include <inttypes.h>.
Move struct kernel_dirent declaration below top include block.
* block.c: Do not include <stdint.h> and <inttypes.h>.
* quota.c: Likewise.
* desc.c: Likewise.
* signal.c: Likewise.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/term.c b/term.c
index 0e8bb13..7b7de74 100644
--- a/term.c
+++ b/term.c
@@ -23,20 +23,16 @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *	$Id$
  */
 
 #include "defs.h"
-
 /*
  * The C library's definition of struct termios might differ from
  * the kernel one, and we need to use the kernel layout.
  */
 #include <linux/termios.h>
-
 #ifdef HAVE_SYS_FILIO_H
-#include <sys/filio.h>
+# include <sys/filio.h>
 #endif
 
 static const struct xlat tcxonc_options[] = {