[Hexagon] Emit lookup tables in text section based on a flag

The flag "-hexagon-emit-lut-text" (defaulted to false) is added to decide
on where to keep the switch generated lookup table.
Differential Revision: https://reviews.llvm.org/D34818


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308316 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed