Set toolchain clang linker to gold

BFD doesn't work with Swift symbols. We get nasty errors like this:

```
error: link command failed with exit code 1 (use -v to see invocation)
/usr/bin/ld: ...wift/CMakeFiles/swiftDispatch.dir/Block.swift.o:
  relocation R_X86_64_PC32 against protected symbol
  `$s8Dispatch0A13WorkItemFlagsVSYAAMc' can not be used when making a
  shared object
/usr/bin/ld: final link failed: bad value
```

Author: etcwilde

utils/build-presets.ini

@@ -904,7 +904,9 @@ reconfigure
 
 # gcc version on amazon linux 2 is too old to configure and build tablegen.
 # Use the clang that we install in the path for macros
-llvm-cmake-options=-DCROSS_TOOLCHAIN_FLAGS_LLVM_NATIVE='-DCMAKE_C_COMPILER=clang;-DCMAKE_CXX_COMPILER=clang++'
+llvm-cmake-options=
+  -DCROSS_TOOLCHAIN_FLAGS_LLVM_NATIVE='-DCMAKE_C_COMPILER=clang;-DCMAKE_CXX_COMPILER=clang++'
+  -DCLANG_DEFAULT_LINKER=gold
 
 [preset: buildbot_linux]
 mixin-preset=