[libfuzzer] Disable failing DFSan-related tests

These have been broken by https://reviews.llvm.org/D104494.
However, `lib/fuzzer/dataflow/` is unused (?) so addressing this is not a priority.

Added TODOs to re-enable them in the future.

Reviewed By: stephan.yichao.zhao

Differential Revision: https://reviews.llvm.org/D104568

GitOrigin-RevId: 070556237e29e8a804fbec1d416d431239384ab0
diff --git a/dataflow/DataFlow.cpp b/dataflow/DataFlow.cpp
index 3af48e2..7e5f041 100644
--- a/dataflow/DataFlow.cpp
+++ b/dataflow/DataFlow.cpp
@@ -90,8 +90,8 @@
   //      We'll need to make a proper in-process symbolizer work with DFSan.
   FILE *Pipe = popen("sed 's/(+/ /g; s/).*//g' "
                      "| llvm-symbolizer "
-                     "| grep 'dfs\\$' "
-                     "| sed 's/dfs\\$//g' "
+                     "| grep '\\.dfsan' "
+                     "| sed 's/\\.dfsan//g' "
                      "| c++filt",
                      "w");
   for (size_t I = 0; I < __dft.NumGuards; I++) {