Fix number of expected mutants for LLVM.

.github/workflows/cxx_apps.sh

@@ -183,7 +183,7 @@ pushd llvm-project
   ${DREDD_EXECUTABLE} --mutation-info-file mutation-info.json -p "${DREDD_ROOT}/llvm-project/build" "${FILES[@]}"
   cmake --build build --target LLVMInstCombine
   NUM_MUTANTS=`python3 ${DREDD_ROOT}/scripts/query_mutant_info.py mutation-info.json --largest-mutant-id`
-  EXPECTED_NUM_MUTANTS=98042
+  EXPECTED_NUM_MUTANTS=97924
   if [ ${NUM_MUTANTS} -ne ${EXPECTED_NUM_MUTANTS} ]
   then
      echo "Found ${NUM_MUTANTS} mutants when mutating the LLVM source code. Expected ${EXPECTED_NUM_MUTANTS}. If Dredd changed recently, the expected value may just need to be updated, if it still looks sensible. Otherwise, there is likely a problem."