Surer `make clean' implementation

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@581 7894878c-1315-0410-8ee3-d5d059ff63e0

prog/detect/Module.mk

@@ -19,6 +19,7 @@
 # 'simply expanded variable'. That means that its value is substituted
 # verbatim in the rules, until it is redefined. 
 MODULE_DIR := prog/detect
+PROGDETECTDIR := $(MODULE_DIR)
 
 # Regrettably, even 'simply expanded variables' will not put their currently
 # defined value verbatim into the command-list of rules...
@@ -39,6 +40,5 @@ install-prog-detect: all-prog-detect
 install :: install-prog-detect
 
 clean-prog-detect:
-	$(RM) $(PROGDETECTSOURCES:.c=.rd) $(PROGDETECTSOURCES:.c=.ro) \
-	      $(PROGDETECTTARGETS)
+	$(RM) $(PROGDETECTDIR)/*.rd $(PROGDETECTDIR)/*.ro $(PROGDETECTTARGETS)
 clean :: clean-prog-detect