Fix compilation of Qt module

Author: j-b-m

src/modules/qt/configure

@@ -61,9 +61,9 @@ else
 
 	echo > config.mak
 
-	if $(echo $qt_version | awk 'if ($0 + 0 > 5.6) exit 0; else exit 1')
+	if $(echo $qt_version | awk '{if ($0 + 0 > 5.6) exit 0; else exit 1;}')
 	then
-		echo USE_CPP11 >> config.mak
+		echo "USE_CPP11=1" >> config.mak
 	fi
 
 	pkg-config --exists 'libexif'