Added St extension and modified Rx Gx to avoid conflict

Change-Id: Ie3a09088eae83e1dff82ff82051e6345c103c171
diff --git a/extensions/dict_St/CMakeLists.txt b/extensions/dict_St/CMakeLists.txt
new file mode 100644
index 0000000..55b743a
--- /dev/null
+++ b/extensions/dict_St/CMakeLists.txt
@@ -0,0 +1,16 @@
+# The dict_St extension
+PROJECT("dict_St library generated by FdGen " C)
+
+# Compile as a module
+FD_ADD_EXTENSION(dict_St dict_St.c)
+
+
+####
+## INSTALL section ##
+
+INSTALL(TARGETS dict_St
+	LIBRARY DESTINATION ${INSTALL_EXTENSIONS_SUFFIX}
+COMPONENT freeDiameter-dictionary-ST)
+
+
+