Add more files to shim

Summary:
X-link: facebookincubator/phabtest_rust#46

These were added recently to fbsource. Need them for buck build

Reviewed By: bigfootjon

Differential Revision: D58203001

fbshipit-source-id: 9c5d33a885a4bea52e8313ded4f7e8aa5667f180

Author: namanahuja

shim/build_defs/roar.bzl

@@ -0,0 +1,7 @@
+load("@fbsource//tools/build_defs:buckconfig.bzl", "read_bool")
+
+def roar_no_jit():
+    use_roar_jit = read_bool("fbcode", "use_roar_jit", required = False)
+    if use_roar_jit:
+        return ["-fforce-no-jit"]
+    return []

shim/tools/build_defs/buckconfig.bzl

@@ -0,0 +1,9 @@
+load("@prelude//utils:buckconfig.bzl", _read = "read", _read_bool = "read_bool", _read_choice = "read_choice", _read_int = "read_int", _read_list = "read_list", _read_string = "read_string", _resolve_alias = "resolve_alias")
+
+read = _read
+read_string = _read_string
+read_choice = _read_choice
+read_bool = _read_bool
+read_int = _read_int
+read_list = _read_list
+resolve_alias = _resolve_alias