Add a virtual destructor for LegalizerInfo.

lib/Target/X86/X86TargetMachine.cpp has a code that deletes an instance of a
LegalizerInfo descendant via a pointer to base.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294757 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed