clean and test let a few remaining files in the source directory

[picca]

In order to produce a clean build of dmrgpp I need to clean the source like this

override_dh_auto_clean:
	[ -f psimaglite/lib/Makefile ] && $(MAKE) -C psimaglite/lib/ clean || true
	[ -f src/Makefile ] && $(MAKE) -C src clean || true
	$(RM) src/KronUtil/libkronutil.a src/libdmrgpp.a src/operator
	$(RM) psimaglite/lib/Makefile src/GitRevision.h
	$(RM) src/KronUtil/Makefile src/Makefile
	$(RM) -f src/KronUtil/test1 src/KronUtil/test2

So it seems that a bunch of generated files remain after a clean.

the psimaglite directory is the embeded version in the Debian package of dmrgpp
tests also generate a bunch of binaries which should be removed after a clean :).

Cheers