Add a missing dependency to DebugInfoDWARF unit tests

BinaryFormat was already being used for various constants, but as of
b761a648 it is alse used for code.

This should fix the shared library build.

llvm/unittests/DebugInfo/DWARF/CMakeLists.txt

@@ -1,6 +1,7 @@
 set(LLVM_LINK_COMPONENTS
   ${LLVM_TARGETS_TO_BUILD}
   AsmPrinter
+  BinaryFormat
   DebugInfoDWARF
   MC
   Object