Update Darwin to LLVM11

Author: kenbell

llvm_config_darwin.go

@@ -4,9 +4,9 @@ package llvm
 
 // Automatically generated by `make config BUILDDIR=`, do not edit.
 
-// #cgo CPPFLAGS: -I/usr/local/opt/llvm@10/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo CPPFLAGS: -I/usr/local/opt/llvm@11/include   -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
 // #cgo CXXFLAGS: -std=c++14
-// #cgo LDFLAGS: -L/usr/local/opt/llvm@10/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lcurses -lm -lxml2 -L/usr/local/opt/libffi/lib -lffi
+// #cgo LDFLAGS: -L/usr/local/opt/llvm@11/lib -Wl,-search_paths_first -Wl,-headerpad_max_install_names -lLLVM -lz -lcurses -lm -lxml2 -L/usr/local/opt/libffi/lib -lffi
 import "C"
 
 type run_build_sh int