New more specific make clean targets for Symbian port

t4id: 261381

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When i use make command for building Hb, let's say for winscw udeb i use make debug-winscw, which according to Makefile is equivalent to:

debug-winscw: $(ABLD)
$(ABLD) build winscw udeb.

Similarly for armv5 it expands to make release-armv5 = $(ABLD) build armv5 urel. So let's say i have Hb built for both winscw udeb
and armv5 urel on my system. Now, for debugging purpose i made some changes and wanted to rebuild Hb for winscw udeb only. When i want to clean the project for winscw udeb (only) i can't use make clean! Because clean in the make file looks like

clean: $(ABLD)
-$(ABLD) reallyclean
-bldmake clean

Which in fact clears all my armv5 urel dlls as well from \epoc32\release\armv5\urel.
So, shouln'd we have clean for winscw/armv5 only defined in the Makefile ? just like building it from make command.

I mean something in the Makefile like

clean-debug-winscw: $(ABLD)
-$(ABLD) reallyclean winscw udeb

clean-release-armv5: $(ABLD)
-$(ABLD) reallyclean armv5 urel