UBUNTU: [Packaging] force creation of headers directory

BugLink: https://bugs.launchpad.net/bugs/1847969

Due to a race condition, some times the headers directory already
exists when running the install-arch-headers rule. Make sure we do
not fail in that case.
Signed-off-by: Alfonso Sánchez-Beato <alfonso.sanchez-beato@canonical.com>
Signed-off-by: Shrirang Bagul <shrirang.bagul@canonical.com>
Acked-by: Kleber Souza <kleber.souza@canonical.com>
Acked-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

debian/rules.d/2-binary-arch.mk

@@ -491,7 +491,8 @@ endif
 		find . -name '.' -o -name '.*' -prune -o -print | \
                 cpio -pvd --preserve-modification-time \
 			$(headers_dir)/usr/include/ )
-	mkdir $(headers_dir)/usr/include/$(DEB_HOST_MULTIARCH)
+	mkdir -p $(headers_dir)/usr/include/$(DEB_HOST_MULTIARCH)
+	rm -rf $(headers_dir)/usr/include/$(DEB_HOST_MULTIARCH)/asm
 	mv $(headers_dir)/usr/include/asm $(headers_dir)/usr/include/$(DEB_HOST_MULTIARCH)/
 
 	rm -rf $(headers_tmp)