Disable symbol searching.
Disable symbol searching.

We don't want the LLVM dynamic loader to try and resolve external symbols by name. As things stand today, if jitted code contains external symbol references we have a bug in the jit.

This anticipates a change I'm about to make in LLVM where I enable the ability to resolve externals by name for x64 COFF RtDyld, since other LLVM clients need this.

Once both changes are in we'll get a somewhat clearer error message when Jitted code has an unsat, e.g.

`LLVM ERROR: Program used external function '__chkstk' which could not be resolved!`

AndyAyersMS/llilc,tempbottle/llilc,richardlford/llilc,swaroop-sridhar/llilc,libengu/llilc,adiaaida/llilc,marksantos/llilc,pgavlin/llilc,BruceForstall/llilc,dkorolev/llilc,kyulee1/llilcjit,marksantos/llilc,manu-silicon/llilc,pgavlin/llilc,dkorolev/llilc,richardlford/llilc,manu-silicon/llilc,swaroop-sridhar/llilc,JosephTremoulet/llilc,kyulee1/llilcjit,JosephTremoulet/llilc,dotnet/llilc,libengu/llilc,tempbottle/llilc,AndyAyersMS/llilc,mmitche/llilc,russellhadley/llilc,libengu/llilc,dotnet/llilc,JosephTremoulet/llilc,adiaaida/llilc,mmitche/llilc,pgavlin/llilc,libengu/llilc,swaroop-sridhar/llilc,dkorolev/llilc,manu-silicon/llilc,russellhadley/llilc,richardlford/llilc,BruceForstall/llilc,mmitche/llilc,dotnet/llilc,marksantos/llilc,kyulee1/llilcjit,adiaaida/llilc,BruceForstall/llilc,mmitche/llilc,russellhadley/llilc,tempbottle/llilc,AndyAyersMS/llilc