add test to check pkg-config and rtm-config returns same and valid value #41

currently it fails due to 
+        self.check_if_file_exists("libdir",             "libRTC.a")    # currently pkg-config returns lib/ and rtm-config retuns .../lib/openrtm-1.1
+        self.check_if_file_exists("includedir",         "openrtm-1.1") # rtm-config does not have --includedir

th