[gn] manually re-sync llvm-exegesis tool deps

As far as I can tell, the non-lib part never depended on MCJIT,
so I'm not sure why I added that. While here, re-sync some other
deps.

Since there's no shared library build for the gn build, no real
behavior change.

Author: nico

llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/BUILD.gn

@@ -4,9 +4,7 @@ executable("llvm-exegesis") {
   deps = [
     "lib",
     "//llvm/lib/CodeGen",
-    "//llvm/lib/CodeGen",
-    "//llvm/lib/ExecutionEngine",
-    "//llvm/lib/ExecutionEngine/MCJIT",
+    "//llvm/lib/DebugInfo/Symbolize",
     "//llvm/lib/MC",
     "//llvm/lib/Object",
     "//llvm/lib/Support",

llvm/utils/gn/secondary/llvm/tools/llvm-exegesis/lib/BUILD.gn

@@ -9,8 +9,11 @@ static_library("lib") {
     "//llvm/lib/CodeGen/GlobalISel",
     "//llvm/lib/ExecutionEngine",
     "//llvm/lib/ExecutionEngine/Orc",
+    "//llvm/lib/ExecutionEngine/RuntimeDyld",
     "//llvm/lib/IR",
     "//llvm/lib/MC",
+    "//llvm/lib/MC/MCDisassembler",
+    "//llvm/lib/MC/MCParser",
     "//llvm/lib/MCA",
     "//llvm/lib/Object",
     "//llvm/lib/ObjectYAML",