Replace boost logging with simple logger

!referencetests:214319

* Reduces arm nn binary size ~15%
* Also fixed test logging black hole issues

Change-Id: Iba27db304d9a8088fa46aeb0b52225d93bb56bc8
Signed-off-by: Derek Lamberti <derek.lamberti@arm.com>
diff --git a/tests/MobileNetSsdDatabase.hpp b/tests/MobileNetSsdDatabase.hpp
index 1a99ed7..1921831 100644
--- a/tests/MobileNetSsdDatabase.hpp
+++ b/tests/MobileNetSsdDatabase.hpp
@@ -12,7 +12,6 @@
 
 #include <armnn/TypesUtils.hpp>
 
-#include <boost/log/trivial.hpp>
 #include <boost/numeric/conversion/cast.hpp>
 
 #include <array>
@@ -100,7 +99,7 @@
     }
     catch (const InferenceTestImageException& e)
     {
-        BOOST_LOG_TRIVIAL(fatal) << "Failed to load image for test case " << testCaseId << ". Error: " << e.what();
+        ARMNN_LOG(fatal) << "Failed to load image for test case " << testCaseId << ". Error: " << e.what();
         return nullptr;
     }