Change DescriptorExtractor_ORB regression test

to compensate for neon ieee754 non-compliancy.
Also changed the comparison between max valid and calculated distance to
make the error message more accurate (in case curMaxDist == maxDist)

modules/features2d/test/test_descriptors_regression.cpp

@@ -132,7 +132,7 @@ protected:
 
         stringstream ss;
         ss << "Max distance between valid and computed descriptors " << curMaxDist;
-        if( curMaxDist < maxDist )
+        if( curMaxDist <= maxDist )
             ss << "." << endl;
         else
         {
@@ -322,7 +322,11 @@ TEST( Features2d_DescriptorExtractor_ORB, regression )
 {
     // TODO adjust the parameters below
     CV_DescriptorExtractorTest<Hamming> test( "descriptor-orb",
+#if CV_NEON
+                                              (CV_DescriptorExtractorTest<Hamming>::DistanceType)25.f,
+#else
                                               (CV_DescriptorExtractorTest<Hamming>::DistanceType)12.f,
+#endif
                                              ORB::create() );
     test.safe_run();
 }