Initial meson build support.

Signed-off-by: Ben Tyner <ben.tyner@ibm.com>
Change-Id: I700334cad9de1b633b3882fc8a2df6d7832832b2
diff --git a/sim/hei_user_defines.hpp b/sim/hei_user_defines.hpp
new file mode 100644
index 0000000..ebb2a8e
--- /dev/null
+++ b/sim/hei_user_defines.hpp
@@ -0,0 +1,3 @@
+#include <stdio.h>
+
+#define HEI_TRAC(...) printf( __VA_ARGS__ ); printf( "\n" );