Matrix: added copyToRaw method to allow copying to a pointer

because most uORB messages still contain all components of a vector one by one after each other

test/copyto.cpp

@@ -38,6 +38,13 @@ int main()
         TEST(fabs(array_A[i] - array_row[i]) < eps);
     }
 
+    // Matrix copyTo with a pointer
+    A.copyToRaw(static_cast <float *> (array_A));
+    float array_row_p[6] = {1, 2, 3, 4, 5, 6};
+    for (size_t i = 0; i < 6; i++) {
+        TEST(fabs(array_A[i] - array_row_p[i]) < eps);
+    }
+
     // Matrix copyToColumnMajor
     A.copyToColumnMajor(array_A);
     float array_column[6] = {1, 4, 2, 5, 3, 6};