[commit: ghc] master: Update submodule stm + random (6ddc991)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/6ddc99116d0107d7781dff1b93d3e8b6f42a99ed/ghc

>---------------------------------------------------------------

commit 6ddc99116d0107d7781dff1b93d3e8b6f42a99ed
Author: Thomas Miedema <thomasmiedema at gmail.com>
Date:   Wed Jan 20 17:41:53 2016 +0100

    Update submodule stm + random
    
    Skip random tests when random is not built.
    Skip stm tests when stm is not built.


>---------------------------------------------------------------

6ddc99116d0107d7781dff1b93d3e8b6f42a99ed
 libraries/random | 2 +-
 libraries/stm    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libraries/random b/libraries/random
index cfdfe6f..c72dd0a 160000
--- a/libraries/random
+++ b/libraries/random
@@ -1 +1 @@
-Subproject commit cfdfe6f09ad414fde5b855cc5f90207533413241
+Subproject commit c72dd0a01ae6255bead2d4fad33f002bb5684030
diff --git a/libraries/stm b/libraries/stm
index 844f84c..302aabc 160000
--- a/libraries/stm
+++ b/libraries/stm
@@ -1 +1 @@
-Subproject commit 844f84c21f94282187f35a6684d3c3c9f32cf2df
+Subproject commit 302aabc3799550b487a45f4c037b9ffbc0cfbc9a