X compilebench: Rework how `tcc -O2` is skipped

Don't continue on `if $CC == tcc` -> instead put actions that are not
appropriate for `tcc -O2` under `if $CC != tcc`. We will add other
actions to that loop - that's the reason.

In preparation to add pystone_pyx.pyx

t/compilebench/doit.sh

@@ -89,17 +89,16 @@ for CC in gcc tcc; do
 	done
 
 	# tcc -O2 does not add anything (tcc accepts -Ox only for compatibility)
-	if [ $CC == tcc ]; then
-		continue
+	if [ $CC != tcc ]; then
+		for i in `seq $N`; do
+			export TIMEFORMAT="Benchmark${CC}compile+linkO2 1 %R s/op"
+			time compileandlink pystone_pypyx "-O2"
+		done
+
+		for i in `seq $N`; do
+			python -c 'import pystone_pypyx as _; _.main()' |pystone2bench ${CC}O2
+		done
 	fi
 
-	for i in `seq $N`; do
-		export TIMEFORMAT="Benchmark${CC}compile+linkO2 1 %R s/op"
-		time compileandlink pystone_pypyx "-O2"
-	done
-
-	for i in `seq $N`; do
-		python -c 'import pystone_pypyx as _; _.main()' |pystone2bench ${CC}O2
-	done
 
 done