[llvm] [CI] Add flang-rt to pre-merge configuration (PR #156039)

[Nikita Popov via llvm-commits]

================
@@ -80,7 +81,8 @@
     "clang-tools-extra": {"libc"},
     "libc": {"libc"},
     "compiler-rt": {"compiler-rt"},
-    ".ci": {"compiler-rt", "libc"},
+    "flang-rt": {"flang-rt"},
----------------
nikic wrote:

Done.

https://github.com/llvm/llvm-project/pull/156039