deploy: Correctly swap bootloader version with new boot checksums

If we had two deployments with different boot checksums, and were
trying to remove the one that was the same and add a new one (the
normal case), we'd end up assuming due to comparison with 0 that
we only needed to do the fast subbootversion swap.

Fix this by actually putting 1 where we really mean 1.

And update the tests to verify the fix; I have double-verified by
undoing the fix, and noting that the test fails.

https://bugzilla.gnome.org/show_bug.cgi?id=708351

tests/libtest.sh

@@ -239,10 +239,15 @@ EOF
 
 os_repository_new_commit ()
 {
+    boot_checksum_iteration=$1
+    echo "BOOT ITERATION: $boot_checksum_iteration"
+    if test -z "$boot_checksum_iteration"; then
+	boot_checksum_iteration=0
+    fi
     cd ${test_tmpdir}/osdata
     rm boot/*
-    echo "new: a kernel" > boot/vmlinuz-3.6.0
-    echo "new: an initramfs" > boot/initramfs-3.6.0
+    echo "new: a kernel ${boot_checksum_iteration}" > boot/vmlinuz-3.6.0
+    echo "new: an initramfs ${boot_checksum_iteration}" > boot/initramfs-3.6.0
     bootcsum=$(cat boot/vmlinuz-3.6.0 boot/initramfs-3.6.0 | sha256sum | cut -f 1 -d ' ')
     export bootcsum
     mv boot/vmlinuz-3.6.0 boot/vmlinuz-3.6.0-${bootcsum}

tests/test-admin-deploy-2.sh

@@ -39,20 +39,24 @@ assert_has_dir sysroot/boot/ostree/testos-${bootcsum}
 echo "ok deploy command"
 
 # Commit + upgrade twice, so that we'll rotate out the original deployment
-orig_bootcsum=${bootcsum}
+bootcsum1=${bootcsum}
 os_repository_new_commit
 ostree --repo=sysroot/ostree/repo remote add testos file://$(pwd)/testos-repo testos/buildmaster/x86_64-runtime
 ostree admin --sysroot=sysroot upgrade --os=testos
-os_repository_new_commit
+bootcsum2=${bootcsum}
+os_repository_new_commit "1"
+bootcsum3=${bootcsum}
 ostree --repo=sysroot/ostree/repo remote add testos file://$(pwd)/testos-repo testos/buildmaster/x86_64-runtime
 ostree admin --sysroot=sysroot upgrade --os=testos
 
 rev=${newrev}
 newrev=$(ostree --repo=sysroot/ostree/repo rev-parse testos/buildmaster/x86_64-runtime)
 assert_not_streq ${rev} ${newrev}
-assert_not_streq ${orig_bootcsum} ${bootcsum}
-assert_not_has_dir sysroot/boot/ostree/testos-${orig_bootcsum}
+assert_not_streq ${bootcsum1} ${bootcsum2}
+assert_not_streq ${bootcsum2} ${bootcsum3}
+assert_not_has_dir sysroot/boot/ostree/testos-${bootcsum1}
 assert_has_dir sysroot/boot/ostree/testos-${bootcsum}
+assert_has_dir sysroot/boot/ostree/testos-${bootcsum2}
 assert_file_has_content sysroot/ostree/deploy/testos/deploy/${newrev}.0/etc/os-release 'NAME=TestOS'
 
 echo "ok deploy and GC /boot"