build: Create $(BUILDDIR) with the targets which need the directory #53
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Without this patch the creation of
$(BUILDDIR)is triggered unrelated by the all target. This only works if all's prerequisites are processed left to right in sequential order. Running the Makefile under make 4.4 (or higher) in --shuffle mode reveals the incorrect dependency by failing to generate$(BUILDDIR)/vpnc,$(BUILDDIR)/cisco-decryptor$(BUILDDIR)/test-cryptodue to the missing directory.The wrong dependency becomes visible as well, moving
$(BUILDDIR)to the end of all's prerequisites list.See https://trofi.github.io/posts/238-new-make-shuffle-mode.html for more information.