[asan][win] Add FIXME comment

Add FIXME to reset timeout when llvm/llvm-project#102513 is fixed.

Author: vitalybuka

buildbot/osuosl/master/config/builders.py

@@ -1712,6 +1712,7 @@
     'factory' : AnnotatedBuilder.getAnnotatedBuildFactory(
                     script="sanitizer-windows.py",
                     depends_on_projects=["llvm", "clang", "lld", "compiler-rt"],
+                    # FIXME: Restore `timeout` to default when fixed https://github.com/llvm/llvm-project/issues/102513
                     timeout=2400)},
 
 # OpenMP builders.