branch core-updates updated (77888fa -> 50915d2)

[???]

iyzsong pushed a change to branch core-updates
in repository guix.

      from  77888fa   gnu: cairo: Enable tee surface backend.
       new  f1886b5   gnu: cmake: Update to 3.1.3.
       new  50915d2   build-system/cmake: Enable verbose output from Makefile 
builds.

The 2 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "adds" were already present in the repository and have only
been added to this reference.


Summary of changes:
 gnu/packages/cmake.scm            |    5 +++--
 guix/build/cmake-build-system.scm |    2 ++
 2 files changed, 5 insertions(+), 2 deletions(-)