improve dependency on header files *.h, and remove clean from make.sh. see PR #793
diff --git a/Makefile b/Makefile
index cc42a78..71f605f 100644
--- a/Makefile
+++ b/Makefile
@@ -346,7 +346,7 @@
 endif
 endif
 
-$(LIBOBJ): config.mk
+$(LIBOBJ): *.h include/*.h config.mk
 
 $(LIBOBJ_ARM): $(DEP_ARM)
 $(LIBOBJ_ARM64): $(DEP_ARM64)