[benchmark][cmake] Fix typo. This is NFC since this option is usually disabled.

Author: gottesmm

benchmark/cmake/modules/AddSwiftBenchmarkSuite.cmake

@@ -134,9 +134,9 @@ function (swift_benchmark_compile_archopts)
       LIBRARY_FLAGS ${common_options_driver} ${BENCH_DRIVER_LIBRARY_FLAGS})
     precondition(objfile_out)
     list(APPEND bench_library_objects "${objfile_out}")
-    if (SWIFT_BENCHMARK_EMIT_SUB)
+    if (SWIFT_BENCHMARK_EMIT_SIB)
       precondition(sibfile_out)
-      list(APPEND bench_library_subfiles "${sibfile_out}")
+      list(APPEND bench_library_sibfiles "${sibfile_out}")
     endif()
   endforeach()
 
@@ -151,9 +151,9 @@ function (swift_benchmark_compile_archopts)
       LIBRARY_FLAGS ${common_options})
     precondition(objfile_out)
     list(APPEND bench_library_objects "${objfile_out}")
-    if (SWIFT_BENCHMARK_EMIT_SUB)
+    if (SWIFT_BENCHMARK_EMIT_SIB)
       precondition(sibfile_out)
-      list(APPEND bench_library_subfiles "${sibfile_out}")
+      list(APPEND bench_library_sibfiles "${sibfile_out}")
     endif()
   endforeach()