Makefile: create parent directories

cp requires the destination directories to already exist. If they do not
exist, it will fail. When packaging applications, it's common they are
installed in an empty directory where the expected directory structure
does not exist yet.

Use `install -D` to copy the files to copy the files so that parent
diretories are automatically created.

Signed-off-by: Kevin Daudt <me@ikke.info>

Makefile

@@ -34,10 +34,11 @@ Documentation/html/git-filter-repo.html:
 	git show origin/docs:html/git-filter-repo.html >Documentation/html/git-filter-repo.html
 
 install: snag_docs #fixup_locale
-	cp -a git-filter-repo "$(bindir)/"
+	install -Dm0755 git-filter-repo "$(bindir)/git-filter-repo"
+	install -dm0755 "$(pythondir)"
 	ln -sf "$(bindir)/git-filter-repo" "$(pythondir)/git_filter_repo.py"
-	cp -a Documentation/man1/git-filter-repo.1 "$(mandir)/man1/git-filter-repo.1"
-	cp -a Documentation/html/git-filter-repo.html "$(htmldir)/git-filter-repo.html"
+	install -Dm0644 Documentation/man1/git-filter-repo.1 "$(mandir)/man1/git-filter-repo.1"
+	install -Dm0644 Documentation/html/git-filter-repo.html "$(htmldir)/git-filter-repo.html"
 	if which mandb > /dev/null; then mandb; fi