build: attempt to fix the buildbots

Linking Release+Asserts executable lldb-gdbserver (without symbols)
liblldb.so: undefined reference to `lldb_private::MemoryHistoryASan::Initialize()'
liblldb.so: undefined reference to `lldb_private::MemoryHistoryASan::Terminate()'
liblldb.so: undefined reference to `vtable for lldb_private::TypeValidatorImpl_CXX'
liblldb.so: undefined reference to `lldb_private::TypeValidatorImpl::TypeValidatorImpl(lldb_private::TypeValidatorImpl::Flags const&)'

liblldb.so underlinked to lldbPluginMemoryHistoryASan.a when building with the
make based build system (as opposed to CMake).

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@217360 91177308-0d34-0410-b5e6-96231b3b80d8