RAI: Change optimization aggressiveness for -O1 from None to Less

Author: kpamnany

src/jitlayers.cpp

@@ -677,7 +677,8 @@ CodeGenOpt::Level CodeGenOptLevelFor(int optlevel)
 #ifdef DISABLE_OPT
     return CodeGenOpt::None;
 #else
-    return optlevel < 2 ? CodeGenOpt::None :
+    return optlevel == 0 ? CodeGenOpt::None :
+        optlevel == 1 ? CodeGenOpt::Less :
         optlevel == 2 ? CodeGenOpt::Default :
         CodeGenOpt::Aggressive;
 #endif