[bazel] Add build rule for llvm-remark-size-diff

[kuhar]

Summary

This binary is used in LIT tests.

Test: bazel run --config=generic_clang -c opt @llvm-project//llvm:llvm-remark-size-diff -- --help

[dblaikie]

Sounds alright to me - thanks! (unless someone's already committed this/something like this)

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

deps = [
         ":AllTargetsAsmParsers",
         ":AllTargetsCodeGens",
         ":BitReader",
         ":Core",
     ],
 )
 
 cc_binary(
+    name = "llvm-remark-size-diff",
+    srcs = glob([
+        "tools/llvm-remark-size-diff/**/*.cpp",
+        "tools/llvm-remark-size-diff/**/*.h",
+    ]),
+    copts = llvm_copts,
+    includes = ["tools/llvm-reark-size-diff"],
+    stamp = 0,
+    deps = [
+        ":Core",
+        ":Demangle",
+        ":Object",
+        ":Remarks",
+        ":Support",
+    ],
+)
+
+cc_binary(
     name = "llvm-rtdyld",
     srcs = glob([
         "tools/llvm-rtdyld/*.cpp",
         "tools/llvm-rtdyld/*.h",
     ]),
     copts = llvm_copts,
     stamp = 0,
     deps = [