branch staging updated (9929338 -> 301b2e7)

[guix-commits]

rhelling pushed a change to branch staging
in repository guix.

      from  9929338   gnu: utf8proc: Update to 2.4.0.
       new  6edbf8d   gnu: vulkan-headers: Update to 1.1.108.
       new  301b2e7   gnu: mesa: Update to 19.1.1.

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/gl.scm     | 19 +++++++++++++++++--
 gnu/packages/vulkan.scm | 30 ++++++++++++++++++++++++++----
 2 files changed, 43 insertions(+), 6 deletions(-)