Use (std) bool instead of custom bool types

OAI is riddled with boolean_t, FALSE, TRUE, etc. This makes no sense, as
there is a standard bool type, and could lead to nasty bugs if a
definition of a bool is non-standard (0 == false, true == !false). This
commit removes all non-standard bools in the whole project.

targets/ARCH/IRIS/USERSPACE/LIB/iris_lib.cpp

@@ -134,7 +134,7 @@ static void trx_iris_end(openair0_device *device) {
       @param buff Buffer which holds the samples
       @param nsamps number of samples to be sent
       @param antenna_id index of the antenna if the device has multiple anteannas
-      @param flags flags must be set to TRUE if timestamp parameter needs to be applied
+      @param flags flags must be set to true if timestamp parameter needs to be applied
 */