[RHEL8][CONTAINER] Runtime check when creating pThreads

It looks like :
  - when running on a Fedora-host
  - with generic kernel
  - in a container
  - even in privileged mode

That is not enough and priority/schedule settings is not allowed.

So at runtime, we check and in case, we don't set up priorities.

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

common/utils/system.h

@@ -58,6 +58,14 @@ void thread_top_init(char *thread_name,
                      uint64_t deadline,
                      uint64_t period);
 
+/****************************************************
+ * Functions to check system at runtime.
+ ****************************************************/
+
+int checkIfFedoraDistribution(void);
+int checkIfGenericKernelOnFedora(void);
+int checkIfInsideContainer(void);
+
 #ifdef __cplusplus
 }
 #endif