yield for scheduler

src/recorder/main.c

@@ -1,3 +1,4 @@
+#include <sched.h>
 #include <signal.h>
 #include <stdbool.h>
 #include <stdint.h>
@@ -193,6 +194,7 @@ int main(int argc, char** argv) {
 
   while (!stop) {
     ps2000_get_streaming_last_values(unit, &get_overview_buffers);
+    sched_yield();
   }
 
   cleanup(unit);