build: remove *.lo, *.a, *.la files from all subdirectories on make clean

.lo files in stubs/, util/ and libcacard/ were not cleaned.
Fix this.

Cc: Blue Swirl <blauwirbel@gmail.com>
Reported-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Makefile

@@ -213,9 +213,9 @@ clean:
 # 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
 	rm -f qemu-options.def
-	find . -name '*.[od]' -type f -exec rm -f {} +
-	rm -f *.a *.lo $(TOOLS) $(HELPERS-y) qemu-ga TAGS cscope.* *.pod *~ */*~
-	rm -f *.la
+	find . -name '*.[oda]' -type f -exec rm -f {} +
+	find . -name '*.l[oa]' -type f -exec rm -f {} +
+	rm -f $(TOOLS) $(HELPERS-y) qemu-ga TAGS cscope.* *.pod *~ */*~
 	rm -Rf .libs
 	rm -f qemu-img-cmds.h
 	@# May not be present in GENERATED_HEADERS