Fix opam lint errors

Signed-off-by: John Else <[email protected]>

Author: johnelse

opam

@@ -1,12 +1,18 @@
-opam-version: "1"
+opam-version: "1.2"
+authors: "Dave Scott"
+homepage: "https://github.com/xapi-project/xcp-idl"
+bug-reports: "https://github.com/xapi-project/xcp-idl/issues"
+dev-repo: "git://github.com/xapi-project/xcp-idl"
 maintainer: "[email protected]"
 build: [
   [make "all"]
-  [make "install"]
 ]
 build-test: [
   [make "test"]
 ]
+install: [
+  [make "install"]
+]
 remove: [
   ["ocamlfind" "remove" "xcp"]
 ]