Makefile: generate tagged RPMs with "-1" release value

Prior to this change, if we built an RPM from a tagged commit, the RPM
would have a release value of "0".

This causes some problems with RPM version comparisons when comparing
version numbers with "rc" tags/packages, which should also have a
less-than-one Release value.

Makefile

@@ -10,7 +10,7 @@ RELEASE := $(shell git describe --tags --match 'v*' \
              | sed 's/^[^-]*-//' \
              | sed 's/-/./')
 ifeq ($(VERSION),$(RELEASE))
-  RELEASE = 0
+  RELEASE = 1
 endif
 NVR := $(NAME)-$(VERSION)-$(RELEASE).el7