samples/landlock: Add clang-format exceptions

In preparation to a following commit, add clang-format on and
clang-format off stanzas around constant definitions.  This enables to
keep aligned values, which is much more readable than packed
definitions.

Link: https://lore.kernel.org/r/20220506160513.523257-7-mic@digikod.net
Cc: stable@vger.kernel.org
Signed-off-by: Mickaël Salaün <mic@digikod.net>

samples/landlock/sandboxer.c

@@ -70,11 +70,15 @@ static int parse_path(char *env_path, const char ***const path_list)
 	return num_paths;
 }
 
+/* clang-format off */
+
 #define ACCESS_FILE ( \
 	LANDLOCK_ACCESS_FS_EXECUTE | \
 	LANDLOCK_ACCESS_FS_WRITE_FILE | \
 	LANDLOCK_ACCESS_FS_READ_FILE)
 
+/* clang-format on */
+
 static int populate_ruleset(
 		const char *const env_var, const int ruleset_fd,
 		const __u64 allowed_access)
@@ -139,6 +143,8 @@ out_free_name:
 	return ret;
 }
 
+/* clang-format off */
+
 #define ACCESS_FS_ROUGHLY_READ ( \
 	LANDLOCK_ACCESS_FS_EXECUTE | \
 	LANDLOCK_ACCESS_FS_READ_FILE | \
@@ -156,6 +162,8 @@ out_free_name:
 	LANDLOCK_ACCESS_FS_MAKE_BLOCK | \
 	LANDLOCK_ACCESS_FS_MAKE_SYM)
 
+/* clang-format on */
+
 int main(const int argc, char *const argv[], char *const *const envp)
 {
 	const char *cmd_path;