FindBoost: Use list(INSERT) to simplify suffix list generation

Modules/FindBoost.cmake

@@ -1390,7 +1390,7 @@ endif()
 if( Boost_USE_STATIC_LIBS )
   set( _boost_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
   if(WIN32)
-    set(CMAKE_FIND_LIBRARY_SUFFIXES .lib .a ${CMAKE_FIND_LIBRARY_SUFFIXES})
+    list(INSERT CMAKE_FIND_LIBRARY_SUFFIXES 0 .lib .a)
   else()
     set(CMAKE_FIND_LIBRARY_SUFFIXES .a )
   endif()