Make GcInfo lib depend on intrinsics_gen
Make GcInfo lib depend on intrinsics_gen

LLVM change r252796 (git hash f805775e) reworked llvm/IR/Attributes.h so
that it now #includes a generated .inc file.  GCInfo.cpp transitively
 #includes Attributes.h, so make it depend on the intrinsics_gen target
(which includes the generation of the .inc file)

adiaaida/llilc,manu-silicon/llilc,swaroop-sridhar/llilc,dotnet/llilc,AndyAyersMS/llilc,swaroop-sridhar/llilc,kyulee1/llilcjit,russellhadley/llilc,manu-silicon/llilc,kyulee1/llilcjit,JosephTremoulet/llilc,BruceForstall/llilc,dotnet/llilc,adiaaida/llilc,dotnet/llilc,JosephTremoulet/llilc,kyulee1/llilcjit,JosephTremoulet/llilc,AndyAyersMS/llilc,AndyAyersMS/llilc,adiaaida/llilc,russellhadley/llilc,BruceForstall/llilc,BruceForstall/llilc,swaroop-sridhar/llilc,russellhadley/llilc,manu-silicon/llilc