Add a Coccinelle front-end script

New targets are added (coccicheck-<mode>) to call the spatch front-end
in the 'scripts' directory with the <mode> argument.

Four modes are defined: report, patch, context, and org.

'report' mode generates a list in the following format:
  file:line:column-column: message

'patch' mode proposes a generic fix, when possible.

'context' mode highlights lines of interest and their context
in a diff-like style.

'org' mode generates a report in the Org mode format of Emacs.

Three semantic patches, with a low rate of false positives, are also added.
Other semantic patches will be propose later.

Nicolas Palix (4):
  Add targets to use the Coccinelle checker
  Add scripts/smpl/drop_kmalloc_cast.cocci
  Add scripts/smpl/kzalloc-simple.cocci
  Add scripts/smpl/resource_size.cocci

 MAINTAINERS                          |   10 +++
 Makefile                             |    9 +++
 scripts/smpl/drop_kmalloc_cast.cocci |   74 +++++++++++++++++++++++++
 scripts/smpl/kzalloc-simple.cocci    |   88 +++++++++++++++++++++++++++++
 scripts/smpl/resource_size.cocci     |  101 ++++++++++++++++++++++++++++++++++
 scripts/spatch.sh                    |   14 +++++
 6 files changed, 296 insertions(+), 0 deletions(-)
 create mode 100644 scripts/smpl/drop_kmalloc_cast.cocci
 create mode 100644 scripts/smpl/kzalloc-simple.cocci
 create mode 100644 scripts/smpl/resource_size.cocci
 create mode 100755 scripts/spatch.sh

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