Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - Merge "ipmi doc: build OpenIPMI lib from sources"
  - ipmi doc: build OpenIPMI lib from sources

    Add instatruction on how to build/install OpenIPMI library from
    sources.

    Change-Id: I04efc09e85829b23941e28e0e85b567c9a3cbdd7
    Signed-off-by: Mytnyk, Volodymyr <volodymyrx.mytnyk@intel.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index 9eae582..15ec4e3 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit 9eae5829c53b597772b9231e863db258a84a5073
+Subproject commit 15ec4e3a0edcb0d38313b19f63bc18d0121e91ef