fix make clean/distclean

A misplaced $(quiet-@) meant that "make clean" and "make distclean" did
not work properly.

Reported-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Makefile

@@ -212,8 +212,8 @@ recurse-clean: $(addsuffix /clean, $(ROM_DIRS))
 ######################################################################
 
 clean: recurse-clean
-	-@test -f build.ninja && $(quiet-@)$(NINJA) $(NINJAFLAGS) -t clean || :
-	-@test -f build.ninja && $(NINJA) $(NINJAFLAGS) clean-ctlist || :
+	-$(quiet-@)test -f build.ninja && $(NINJA) $(NINJAFLAGS) -t clean || :
+	-$(quiet-@)test -f build.ninja && $(NINJA) $(NINJAFLAGS) clean-ctlist || :
 # avoid old build problems by removing potentially incorrect old files
 	rm -f config.mak op-i386.h opc-i386.h gen-op-i386.h op-arm.h opc-arm.h gen-op-arm.h
 	find . \( -name '*.so' -o -name '*.dll' -o -name '*.[oda]' \) -type f \
@@ -231,7 +231,7 @@ qemu-%.tar.bz2:
 	$(SRC_PATH)/scripts/make-release "$(SRC_PATH)" "$(patsubst qemu-%.tar.bz2,%,$@)"
 
 distclean: clean
-	-@test -f build.ninja && $(quiet-@)$(NINJA) $(NINJAFLAGS) -t clean -g || :
+	-$(quiet-@)test -f build.ninja && $(NINJA) $(NINJAFLAGS) -t clean -g || :
 	rm -f config-host.mak config-host.h*
 	rm -f tests/tcg/config-*.mak
 	rm -f config-all-disas.mak config.status