Import Cobalt 19.master.0.203780

Includes the following patches:
  https://cobalt-review.googlesource.com/c/cobalt/+/5210
    by errong.leng@samsung.com
  https://cobalt-review.googlesource.com/c/cobalt/+/5270
    by linus.wang@samsung.com
diff --git a/src/third_party/llvm-project/compiler-rt/.arcconfig b/src/third_party/llvm-project/compiler-rt/.arcconfig
new file mode 100644
index 0000000..74604d3
--- /dev/null
+++ b/src/third_party/llvm-project/compiler-rt/.arcconfig
@@ -0,0 +1,4 @@
+{
+  "repository.callsign" : "CRT",
+  "conduit_uri" : "https://reviews.llvm.org/"
+}