QuRT: fixes to unbreak cmake build for QuRT

Updated DSPAL version.
Fixed missing lib in config.
Fixed heafers for missing timespec definition.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

src/platforms/posix/work_queue/hrt_thread.c

@@ -40,6 +40,7 @@
 
 #include <px4_config.h>
 #include <px4_defines.h>
+#include <px4_posix.h>
 #include <stdint.h>
 #include <signal.h>
 #include <stdio.h>

src/platforms/qurt/px4_layer/drv_hrt.c

@@ -37,10 +37,12 @@
  * High-resolution timer with callouts and timekeeping.
  */
 
+#include <px4_defines.h>
 #include <px4_workqueue.h>
 #include <drivers/drv_hrt.h>
 #include <semaphore.h>
 #include <time.h>
+#include <dspal_time.h>
 #include <string.h>
 #include <stdio.h>