Remove dependency from Host -> Core.

I wasn't actually trying to eliminate this one, but looks like
it happened as a side effect of moving Symbols out of Host.

llvm-svn: 355037

Author: Zachary Turner

lldb/source/Host/CMakeLists.txt

@@ -163,7 +163,6 @@ add_lldb_library(lldbHost
   ${HOST_SOURCES}
 
   LINK_LIBS
-    lldbCore
     lldbTarget
     lldbUtility
     ${EXTRA_LIBS}