added default compiler flags to property defaults

bundles/fr.irisa.cairn.gecos.typeexploration/src/fr/irisa/cairn/gecos/typeexploration/Configuration.java

@@ -66,7 +66,7 @@ public class Configuration {
 	enum Property {
 		CC("CC", "g++", 
 				"Compiler used during profiling. The current simulation based profiler assumes gcc/g++ options are accepted."),
-		EXTRA_CFLAGS("EXTRA_CFLAGS", "", 
+		EXTRA_CFLAGS("EXTRA_CFLAGS", "-O2 -Wno-everything", 
 				"Additional compiler flags to be used during profiling runs."),
 		COST_MODEL_FILEPATH("COST_MODEL_DSL", "", 
 				"Path to DSL that specify model of computation used in cost models."),