deletes temporary signing_key.x509 and reserves user-defined x509.genkey

Signed-off-by: longguang.yue <bigclouds@163.com>
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 37e37565515e..7ad2679fa1ab 100644
--- a/Makefile
+++ b/Makefile
@@ -1589,7 +1589,7 @@ MRPROPER_FILES += include/config include/generated          \
 		  .config .config.old .version \
 		  Module.symvers \
 		  certs/signing_key.pem \
-		  certs/x509.genkey \
+		  certs/signing_key.x509 \
 		  vmlinux-gdb.py \
 		  rpmbuild \
 		  rust/libmacros.so rust/libmacros.dylib
-- 
2.34.1