Buildsystem: Initial changes to support building with vs clang toolset

(cherry picked from commit 4a3a178d7f)

src/common/CMakeLists.txt

@@ -33,8 +33,8 @@ GroupSources(${CMAKE_CURRENT_SOURCE_DIR})
 add_definitions(-DTRINITY_API_EXPORT_COMMON)
 
 add_library(common
-  ${PRIVATE_SOURCES}
   ${PRIVATE_PCH_SOURCE}
+  ${PRIVATE_SOURCES}
 )
 
 # Do NOT add any extra include directory here, as we don't want the common