[libcalamares] Mark KPM support API as such

- Some of these classes are only compiled in when KPMcore is found.

src/libcalamares/partition/FileSystem.h

@@ -17,6 +17,12 @@
  *   You should have received a copy of the GNU General Public License
  *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
  */
+
+/*
+ * NOTE: this functionality is only available when Calamares is compiled
+ *       with KPMcore support.
+ */
+
 #ifndef PARTITION_FILESYSTEM_H
 #define PARTITION_FILESYSTEM_H
 

src/libcalamares/partition/KPMManager.h

@@ -16,6 +16,11 @@
  *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
  */
 
+/*
+ * NOTE: this functionality is only available when Calamares is compiled
+ *       with KPMcore support.
+ */
+
 #ifndef PARTITION_KPMMANAGER_H
 #define PARTITION_KPMMANAGER_H
 

src/libcalamares/partition/PartitionIterator.h

@@ -18,6 +18,11 @@
  *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
  */
 
+/*
+ * NOTE: this functionality is only available when Calamares is compiled
+ *       with KPMcore support.
+ */
+
 #ifndef PARTITION_PARTITIONITERATOR_H
 #define PARTITION_PARTITIONITERATOR_H
 

src/libcalamares/partition/PartitionQuery.h

@@ -17,6 +17,12 @@
  *   You should have received a copy of the GNU General Public License
  *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
  */
+
+/*
+ * NOTE: this functionality is only available when Calamares is compiled
+ *       with KPMcore support.
+ */
+
 #ifndef PARTITION_PARTITIONQUERY_H
 #define PARTITION_PARTITIONQUERY_H