[tblgen] Disable Leak detection for ASan/GCC and LSan/LLVM

Summary: Add support for sanitizing TableGen.cpp with ASan/GCC and LSan/LLVM.

Reviewers: fjricci, kcc, aaron.ballman, mgorny

Reviewed By: fjricci

Subscribers: jakubjelinek, llvm-commits, #llvm

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67908

llvm-svn: 372731