Remove include <log.h> from defines.h

The reason for this is that log.h includes drv_hrt.h which sucks in
half the project's include files with it, which causes strange build
issues

platforms/posix/src/px4/common/print_load.cpp

@@ -46,6 +46,7 @@
 #include <stdio.h>
 #include <stdbool.h>
 
+#include <px4_platform_common/log.h>
 #include <px4_platform_common/printload.h>
 #include <drivers/drv_hrt.h>
 

platforms/posix/src/px4/common/px4_init.cpp

@@ -34,6 +34,7 @@
 #include <px4_platform_common/init.h>
 #include <px4_platform_common/px4_config.h>
 #include <px4_platform_common/defines.h>
+#include <px4_platform_common/log.h>
 #include <drivers/drv_hrt.h>
 #include <lib/parameters/param.h>
 #include <px4_platform_common/px4_work_queue/WorkQueueManager.hpp>

platforms/posix/src/px4/common/px4_sem.cpp

@@ -38,6 +38,7 @@
  */
 
 #include <px4_platform_common/defines.h>
+#include <px4_platform_common/log.h>
 #include <px4_platform_common/workqueue.h>
 #include <px4_platform_common/time.h>
 #include <stdint.h>