test: add test for granular upgrade

test/upgrade.repo

@@ -25,3 +25,8 @@ S:1
 I:1
 D:libnew
 
+C:Q1C4uoV7SdMdDhYg4OCVmI71D8HIE=
+P:b
+V:2
+S:1
+I:1

test/upgrade3.installed

@@ -0,0 +1,18 @@
+C:Q1EyN5AdpAOBJWKMR89pp/C66o+OE=
+P:libold
+V:1
+S:1
+I:1
+
+C:Q1eVpkasfqZAukAXFYbgwt4xAEEEe=
+P:app
+V:1
+S:1
+I:1
+D:libold
+
+C:Q1C4uoV7SdMdDhYg4OCVmI71D8HIA=
+P:b
+V:1
+S:1
+I:1

test/upgrade3.test

@@ -0,0 +1,8 @@
+@ARGS
+--test-repo upgrade.repo
+--test-instdb upgrade3.installed
+--test-world "app b"
+upgrade b
+@EXPECT
+(1/1) Upgrading b (1 -> 2)
+OK: 0 MiB in 3 packages