Package upgrade: cmake

Alpine version: 3.3.2 (2015-09-17) since commit:8ebaf602 (2015-09-21)
Latest version: 3.4.1 (2015-12-02)

(from redmine: issue id 4916, created on 2015-12-03, closed on 2016-05-31)

main/cmake: upgrade to 3.4.0

fixes #4916

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information