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/util.c b/util.c
index 33e4288..9173b48 100644
--- a/util.c
+++ b/util.c
@@ -29,12 +29,9 @@
  * 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"
-
 #include <sys/user.h>
 #include <sys/param.h>
 #include <fcntl.h>
@@ -43,7 +40,7 @@
 #endif
 
 #if __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 1)
-#include <linux/ptrace.h>
+# include <linux/ptrace.h>
 #endif
 
 #if defined(IA64)