build_wrapper: Fix warning reported by pylint

  W:728,4:handle_installer_build: Redefining built-in 'license'

Change-Id: Ifa4c59ab3320b7ac3211ad74ed6f89b6a3dc813f
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Revert "Mac: Disable MySQL plugin for the time being"

OS X 10.8 has all the MySQL libraries installed now.

This reverts commit 954e29e550501f42ac60c048d94c6dd22520c03b.

Change-Id: I6285b1a09d5ad955a39f1ff99aa4cbbb2eb8898e
Reviewed-by: Heikki Halmet <heikki.halmet@digia.com>
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Correcting application windows build.

Windows uses jom (default is make).

Change-Id: Iac7714c7b300517e1cfde895d450989360d0fc99
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>