bluetooth: Our kernel is missing CLOCK_BOOTTIME_ALARM (alarmtimer)

* Kernel is still using drivers/rtc/alarm.c, instead of the newer
  kernel/time/alarmtimer.c

Change-Id: I2b8635fa887b2cfc0fca820fb560539475124534

bluetooth/bdroid_buildcfg.h

@@ -29,4 +29,8 @@
 #define BTA_BLE_SKIP_CONN_UPD FALSE
 #define BLE_PERIPHERAL_ADV_NAME FALSE
 #define BT_CLEAN_TURN_ON_DISABLED 1
+
+/* Defined if the kernel does not have support for CLOCK_BOOTTIME_ALARM */
+#define KERNEL_MISSING_CLOCK_BOOTTIME_ALARM TRUE
+
 #endif