[lld][Mach-O] Fix build with Mach-O due to missing library

Summary:
The build was failing due to an undefined symbol. This is because this
function is defined in the `BitWriter` component but was not linked.

diff --git a/lld/MachO/CMakeLists.txt b/lld/MachO/CMakeLists.txt
index 9264d47..ea26889 100644 (file)
--- a/lld/MachO/CMakeLists.txt
+++ b/lld/MachO/CMakeLists.txt
@@ -38,6 +38,7 @@ add_lld_library(lldMachO
   ${LLVM_TARGETS_TO_BUILD}
   BinaryFormat
   BitReader
+  BitWriter
   Core
   DebugInfoDWARF
   Demangle