Move CFG building code to a new lib/MC/MCAnalysis library.

The new library is 150KB on a Release+Asserts build, so it is quiet a bit of
code that regular users of MC don't need to link with now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212209 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-objdump/CMakeLists.txt

@@ -2,6 +2,7 @@ set(LLVM_LINK_COMPONENTS
   ${LLVM_TARGETS_TO_BUILD}
   DebugInfo
   MC
+  MCAnalysis
   Object
   Support
   )