cpoll_cppsp: remove compiled cppsp pages during "make clean"

cpoll_cppsp/Makefile

@@ -2,6 +2,7 @@ all: cppsp_0.2
 
 clean:
 	rm -rf cppsp_0.2-rc9 cppsp_0.2
+	rm -f www/*.so www/*.txt
 cppsp_0.2: cppsp_0.2-rc9.tar.xz
 	tar xf cppsp_0.2-rc9.tar.xz
 	ln -s cppsp_0.2-rc9 cppsp_0.2