Profiling symbols missing from JavaScriptCore.framework. This happened after introducing `libJavaScriptCore.a` in 270226@main since these two lines were moved from `JavaScriptCore.xcconfig` to `libJavaScriptCore.xcconfig` instead of to `BaseTarget.xcconfig`, which caused `-fprofile-instr-generate` not to be included when linking `JavaScriptCore.framework`: ``` CLANG_INSTRUMENT_FOR_OPTIMIZATION_PROFILING = $(CLANG_INSTRUMENT_FOR_OPTIMIZATION_PROFILING_$(ENABLE_LLVM_PROFILE_GENERATION)); CLANG_INSTRUMENT_FOR_OPTIMIZATION_PROFILING_ENABLE_LLVM_PROFILE_GENERATION = YES; ```