atusb: added "clean" targets to main and CAM makefile

- Makefile: added "clean" target
- cam2/Makefile: added "clean" target (for file generated in cam2/)
- cam2/mkmk: added "clean" target to generated makefile

atusb/Makefile

@@ -1,7 +1,7 @@
-.PHONY:		all gen generate sch brd xpdf front back
+.PHONY:		all gen generate sch brd xpdf front back clean
 
 all:
-		@echo "make what ? target: gen sch brd xpdf front back"
+		@echo "make what ? target: gen sch brd xpdf front back clean"
 		@exit 1
 
 gen generate:
@@ -42,3 +42,7 @@ atusb-Front.ps:	atusb.brd
 
 atusb-Back.ps:	atusb.brd
 		pcbnew -p=ps_a4 -l Back --ps-pads-drill-opt=none $<
+
+clean:
+		rm -f atusb-Front.ps atusb-Back.ps
+		rm -f atusb.drl atusb-PCB_Edges.gbr

atusb/cam2/Makefile

@@ -1,4 +1,4 @@
-.PHONY:			all
+.PHONY:			all clean
 
 all:			Makefile.mkmk
 
@@ -12,3 +12,6 @@ Makefile.mkmk:		mkmk ../atusb.drl ../atusb-PCB_Edges.gbr
 			pcbnew --plot=gerber -l PCB_Edges `pwd`/../atusb.brd
 
 -include Makefile.mkmk
+
+clean::
+			rm -f Makefile.mkmk

atusb/cam2/mkmk

@@ -60,4 +60,7 @@ plot:
 dplot:
 		echo 'plot "< sed /^\$\$/d drill.gp" with linespoints' | \
 		  gnuplot -persist
+
+clean::
+		rm -f mill.gp mill.rml drill.gp drill.rml
 EOF