rpm: fix %kernelrelease syntax

kernel.spec

@@ -455,18 +455,18 @@ Qubes domU kernel.
 
 %post qubes-vm
 
-mkdir /tmp/qubes-modules-%kernelrelease
-truncate -s 500M /tmp/qubes-modules-%kernelrelease.img
-mkfs -t ext3 -F /tmp/qubes-modules-%kernelrelease.img > /dev/null
-mount /tmp/qubes-modules-%kernelrelease.img /tmp/qubes-modules-%kernelrelease -o loop
-cp -a -t /tmp/qubes-modules-%kernelrelease %vm_install_dir/modules/%kernelrelease
-mkdir /tmp/qubes-modules-%kernelrelease/firmware
-cp -a -t /tmp/qubes-modules-%kernelrelease/firmware %vm_install_dir/modules/firmware/%kernelrelease
-cp %vm_install_dir/vmlinuz /tmp/qubes-modules-%kernelrelease/
-cp %vm_install_dir/initramfs /tmp/qubes-modules-%kernelrelease/
-umount /tmp/qubes-modules-%kernelrelease
-rmdir /tmp/qubes-modules-%kernelrelease
-mv /tmp/qubes-modules-%kernelrelease.img %vm_install_dir/modules.img
+mkdir /tmp/qubes-modules-%{kernelrelease}
+truncate -s 500M /tmp/qubes-modules-%{kernelrelease}.img
+mkfs -t ext3 -F /tmp/qubes-modules-%{kernelrelease}.img > /dev/null
+mount /tmp/qubes-modules-%{kernelrelease}.img /tmp/qubes-modules-%{kernelrelease} -o loop
+cp -a -t /tmp/qubes-modules-%{kernelrelease} %vm_install_dir/modules/%{kernelrelease}
+mkdir /tmp/qubes-modules-%{kernelrelease}/firmware
+cp -a -t /tmp/qubes-modules-%{kernelrelease}/firmware %vm_install_dir/modules/firmware/%{kernelrelease}
+cp %vm_install_dir/vmlinuz /tmp/qubes-modules-%{kernelrelease}/
+cp %vm_install_dir/initramfs /tmp/qubes-modules-%{kernelrelease}/
+umount /tmp/qubes-modules-%{kernelrelease}
+rmdir /tmp/qubes-modules-%{kernelrelease}
+mv /tmp/qubes-modules-%{kernelrelease}.img %vm_install_dir/modules.img
 
 # If qubes-prefs isn't installed yet, the default kernel will be set by %post
 # of qubes-core-dom0