Fix non-Yocto build error

When building non yocto version of intel-ipmi-oem, it will complain
 for sdbusplus/timer.hpp not found.
Updating GIT TAG to recent version could fix it.

Change-Id: Ieccac140504a99ee3a63e6594cf0ffcf4244fcaf
Signed-off-by: Jia, Chunhui <chunhui.jia@linux.intel.com>
diff --git a/CMakeLists.txt.in b/CMakeLists.txt.in
index 7a7f146..daee06c 100644
--- a/CMakeLists.txt.in
+++ b/CMakeLists.txt.in
@@ -9,7 +9,7 @@
 externalproject_add (
     sdbusplus-project PREFIX ${CMAKE_BINARY_DIR}/sdbusplus-project
     GIT_REPOSITORY https://github.com/openbmc/sdbusplus.git GIT_TAG
-    69425eb7d30816c03f88962c44b12b6de5b3cc71 SOURCE_DIR
+    6b4fb2969cd0c853ff6aa7f9bdd3ddaa0081c204 SOURCE_DIR
     ${CMAKE_BINARY_DIR}/sdbusplus-src BINARY_DIR
     ${CMAKE_BINARY_DIR}/sdbusplus-build CONFIGURE_COMMAND "" BUILD_COMMAND cd
     ${CMAKE_BINARY_DIR}/sdbusplus-src && ./bootstrap.sh clean && ./bootstrap.sh