Build fixes for qurt after rebase on PX4 master

Removed the re-definitions of the usage method in the posix/main.cpp file.
Added qurt_external_hook interface to call externally linked module.
Fixed code format to comply with PX4 style.
Added usage information to main app and handled cases for unknown arguments.
Fixed the orb_priority interface to use int32_t instead of int.
Fixes to get hil working with led changes.
Added the config_eagle_adsp.mk file and update the make files to to use new
include/lib paths

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

src/modules/uORB/uORB.cpp

@@ -284,7 +284,7 @@ int  orb_group_count(const struct orb_metadata *meta)
  *      priority, independent of the startup order of the associated publishers.
  * @return    OK on success, ERROR otherwise with errno set accordingly.
  */
-int  orb_priority(int handle, int *priority)
+int  orb_priority(int handle, int32_t *priority)
 {
 	return uORB::Manager::get_instance()->orb_priority(handle, priority);
 }

src/modules/uORB/uORBManager.hpp

@@ -269,7 +269,7 @@ public:
 	 *      priority, independent of the startup order of the associated publishers.
 	 * @return    OK on success, ERROR otherwise with errno set accordingly.
 	 */
-	int  orb_priority(int handle, int *priority) ;
+	int  orb_priority(int handle, int32_t *priority) ;
 
 	/**
 	 * Set the minimum interval between which updates are seen for a subscription.

src/modules/uORB/uORBManager_nuttx.cpp

@@ -166,7 +166,7 @@ int uORB::Manager::orb_stat(int handle, uint64_t *time)
 	return ioctl(handle, ORBIOCLASTUPDATE, (unsigned long)(uintptr_t)time);
 }
 
-int uORB::Manager::orb_priority(int handle, int *priority)
+int uORB::Manager::orb_priority(int handle, int32_t *priority)
 {
 	return ioctl(handle, ORBIOCGPRIORITY, (unsigned long)(uintptr_t)priority);
 }

src/modules/uORB/uORBManager_posix.cpp

@@ -172,7 +172,7 @@ int uORB::Manager::orb_stat(int handle, uint64_t *time)
 	return px4_ioctl(handle, ORBIOCLASTUPDATE, (unsigned long)(uintptr_t)time);
 }
 
-int uORB::Manager::orb_priority(int handle, int *priority)
+int uORB::Manager::orb_priority(int handle, int32_t *priority)
 {
 	return px4_ioctl(handle, ORBIOCGPRIORITY, (unsigned long)(uintptr_t)priority);
 }