Move variant usage to std

Since sdbusplus now uses std, it's cleaner just to
use the variant type directly not behind the namespace.

Also updates clang format.

Style only change.

Tested-by: It builds

Change-Id: I2b7e3ae6b0135cda3e8443e8f910009e6e857f87
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 79c1772..8aeb6d1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -48,7 +48,7 @@
     externalproject_add (sdbusplus-project PREFIX
                          ${CMAKE_BINARY_DIR}/sdbusplus-project GIT_REPOSITORY
                          https://github.com/openbmc/sdbusplus.git GIT_TAG
-                         076d14af2b3e29e48471ffb7fab632317da0fc21 SOURCE_DIR
+                         bed15f0cee4784acdf151cca14efdfb98cb9d397 SOURCE_DIR
                          ${CMAKE_BINARY_DIR}/sdbusplus-src BINARY_DIR
                          ${CMAKE_BINARY_DIR}/sdbusplus-build CONFIGURE_COMMAND
                          "" BUILD_COMMAND cd ${CMAKE_BINARY_DIR}/sdbusplus-src