Revert "[Bazel] Fix llvm-exegesis build post 12b0ab2"

This reverts commit 1449b34. The
corresponding CMake commit (12b0ab2) was reverted.

Author: gribozavr

utils/bazel/llvm-project-overlay/llvm/BUILD.bazel

@@ -3117,7 +3117,7 @@ cc_library(
         ":MC",
         ":MCA",
         ":MCDisassembler",
-        ":OrcJIT",
+        ":MCJIT",
         ":Object",
         ":ObjectYAML",
         ":Support",