ios: use consistent paths in build dir creation

Change-Id: I23ed6569eb0b87a32d4e0920a9ea42536e9e2af4
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>
iossim: pass all arguments to simulator

Change-Id: I805022cd6eb1ca7a49c90a9c294bf23976146e0e
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>