[nrf noup] Bluetooth: Temporarily add C++ over internal header file

This unblocks a specific use case where this header file is included.

Signed-off-by: Rubin Gerritsen <[email protected]>

Author: rugeGerritsen

subsys/bluetooth/host/keys.h

@@ -19,6 +19,10 @@
 #include <zephyr/sys/util_macro.h>
 #include <zephyr/toolchain.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /** @cond INTERNAL_HIDDEN */
 
 enum bt_keys_type {
@@ -249,4 +253,8 @@ void bt_keys_show_sniffer_info(struct bt_keys *keys, void *data);
 
 /** @endcond */
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* ZEPHYR_SUBSYS_BLUETOOTH_HOST_KEYS_H_ */