dist: fix build failure after tarname change

Upstream: no
Signed-off-by: Kairui Song <kasong@tencent.com>

dist/Makefile

@@ -147,7 +147,7 @@ default: dist-help
 
 $(TARFILE):
 	@echo "Generating kernel source tar: $(TARFILE)"
-	@cd $(TOPDIR); git archive $(GITREF) $(TOPDIR) --format=tar.gz --prefix-$(TARNAME)/ --output $(TARFILE)
+	@cd $(TOPDIR); git archive $(GITREF) $(TOPDIR) --format=tar.gz --prefix=$(TARNAME)/ --output $(TARFILE)
 
 dist-tarball: $(TARFILE)
 	@echo "$(TARFILE)"

dist/scripts/gen-spec.sh

@@ -48,7 +48,7 @@ prepare_source_info() {
 DEFAULT_DISALBED=""
 while [[ $# -gt 0 ]]; do
 	case $1 in
-		--kernel-tar )
+		--kernel-tarname )
 			KERNEL_TARNAME=$2
 			shift 2
 			;;