[redhat] Makefile: allow automotive dist tag override

JIRA: INTERNAL
Upstream Status: RHEL only

DIST is defined in Makefile.variables and therefore it cannot be
overridden by the rpm macro %dist. For automotive we need to be able to
override RHEL's dist tag with automotive's.

Signed-off-by: Scott Weaver <scweaver@redhat.com>

Author: swvrrh

redhat/Makefile

@@ -83,6 +83,11 @@ BUILD_TARGET_USERDEF:=$(BUILD_TARGET)
 
 ifndef DIST
   DIST := $(shell $(RPMBUILD) --eval '%{?dist}')
+else
+  # automotive uses a different dist tag
+  ifeq ($(DIST)iv, $(shell $(RPMBUILD) --eval '%{?dist}'))
+    DIST:=$(shell $(RPMBUILD) --eval '%{?dist}')
+  endif
 endif
 
 ifndef DISTRO