x11/hs-X11: Re-add Xinerama support for dual-monitor configurations

PR:             ports/178336
Submitted by:   Christopher J. Ruwe <cjr@cruwe.de>
databases/hs-persistent: 1.1.5.1 --> 1.2.0.1
databases/hs-persistent-sqlite: 1.1.5 --> 1.2.0
databases/hs-persistent-template: 1.1.3.1 --> 1.2.0
devel/hs-IORefCAS: 0.2 --> 0.2.0.1
devel/hs-abstract-deque: 0.1.6 --> 0.2
devel/hs-asn1-types: 0.1.0 --> 0.1.3
devel/hs-basic-prelude: 0.3.4.0 --> 0.3.5.0
devel/hs-binary-shared: 0.8.2 --> 0.8.3
devel/hs-bytestring-show: 0.3.5.4 --> 0.3.5.5
devel/hs-conduit: 1.0.4.2 --> 1.0.5
devel/hs-hashable: 1.2.0.6 --> 1.2.0.7
devel/hs-git-annex: 4.20130417 --> 4.20130501.1
devel/hs-hspec: 1.5.3 --> 1.5.4
devel/hs-lifted-base: 0.2.0.4 --> 0.2.0.5
devel/hs-pool-conduit: 0.1.1 --> 0.1.2
devel/hs-reflection: 1.2.0.1 --> 1.3.1
devel/hs-scion-browser: 0.2.14 --> 0.2.16
devel/hs-tagged: 0.4.5 --> 0.6
devel/hs-unordered-containers: 0.2.3.0 --> 0.2.3.1