Fix configurations such as 'dist' and tar building

For config targets such as 'dist', which doesn't have a BASE template,
we still need to have a default build scheme.

Additionally, the unified Makefile template's target 'tar' wasn't
quite as flexible as the unixmake one.

Finally, .travis-create-release.sh can be somewhat simplified now that
it builds with the unified build scheme.

Reviewed-by: Matt Caswell <matt@openssl.org>

.travis-create-release.sh

@@ -5,8 +5,7 @@
 ./Configure dist
 if [ "$1" == osx ]; then
     make NAME='_srcdist' TARFLAGS='-n' TARFILE='_srcdist.tar' \
-	 TAR_COMMAND='$(TAR) $(TARFLAGS) -s "|^|$(NAME)/|" -T $(TARFILE).list -cvf -' \
-	 SHELL='sh -vx' tar
+	 TAR_COMMAND='$(TAR) $(TARFLAGS) -cvf -' tar
 else
-    make TARFILE='_srcdist.tar' NAME='_srcdist' SHELL='sh -v' dist
+    make TARFILE='_srcdist.tar' NAME='_srcdist' dist
 fi

Configurations/00-base-templates.conf

@@ -35,6 +35,9 @@
 	shared_ldflag	=> "",
 	shared_rcflag	=> "",
 	shared_extension	=> "",
+
+        build_scheme    => [ "unified", "unix" ],
+        build_file      => "Makefile",
     },
 
     BASE_common => {

Configurations/unix-Makefile.tmpl

@@ -660,9 +660,11 @@ tags TAGS: FORCE
 
 # Release targets (note: only available on Unix) #####################
 
+TAR_COMMAND=$(TAR) $(TARFLAGS) --owner 0 --group 0 -cvf - 
+PREPARE_CMD=:
 tar:
 	TMPDIR=/var/tmp/openssl-copy.$$$$; \
-	DISTDIR=openssl-$(VERSION); \
+	DISTDIR=$(NAME); \
 	mkdir -p $$TMPDIR/$$DISTDIR; \
 	(cd $(SRCDIR); \
 	 git ls-tree -r --name-only --full-tree HEAD \
@@ -671,11 +673,11 @@ tar:
 	       cp $$F $$TMPDIR/$$DISTDIR/$$F; \
 	   done); \
 	(cd $$TMPDIR; \
-	 [ -n "$(PREPARE_CMD)" ] && $(PREPARE_CMD); \
+	 $(PREPARE_CMD); \
 	 find $$TMPDIR/$$DISTDIR -type d -print | xargs chmod 755; \
 	 find $$TMPDIR/$$DISTDIR -type f -print | xargs chmod a+r; \
 	 find $$TMPDIR/$$DISTDIR -type f -perm -0100 -print | xargs chmod a+x; \
-	 $(TAR) $(TARFLAGS) --owner 0 --group 0 -cvf - $$DISTDIR) \
+	 $(TAR_COMMAND) $$DISTDIR) \
 	| (cd $(SRCDIR); gzip --best > $(TARFILE).gz); \
 	rm -rf $$TMPDIR
 	cd $(SRCDIR); ls -l $(TARFILE).gz