Make sure bindir exists before installing to it.
Without this, installing to a temporary directory tree (as done by
some package managers) installs cstool as the file /usr/bin.
This brings next in line with the behavior of master.
diff --git a/Makefile b/Makefile
index ee1f2a8..dcbfd9e 100644
--- a/Makefile
+++ b/Makefile
@@ -416,6 +416,7 @@
$(INSTALL_DATA) include/capstone/*.h $(DESTDIR)$(INCDIR)/$(LIBNAME)
mkdir -p $(DESTDIR)$(PKGCFGDIR)
$(INSTALL_DATA) $(PKGCFGF) $(DESTDIR)$(PKGCFGDIR)
+ mkdir -p $(DESTDIR)$(BINDIR)
$(INSTALL_LIB) cstool/cstool $(DESTDIR)$(BINDIR)
uninstall: