Update presets to include the SourceKit stress tester executables in the osx package

Author: Nathan Hawes

utils/build-presets.ini

@@ -1021,6 +1021,8 @@ watchos
 lldb
 llbuild
 swiftpm
+swiftsyntax
+skstresstester
 playgroundsupport
 
 # Build with debug info, this allows us to symbolicate crashes from
@@ -1044,6 +1046,9 @@ install-swift
 install-lldb
 install-llbuild
 install-swiftpm
+install-swiftsyntax
+skip-install-swiftsyntax-module
+install-skstresstester
 install-playgroundsupport
 
 install-destdir=%(install_destdir)s
@@ -1151,10 +1156,7 @@ skip-test-lldb
 skip-test-cmark
 skip-test-playgroundsupport
 skip-test-swiftsyntax
-
-swiftsyntax
-install-swiftsyntax
-skip-install-swiftsyntax-module
+skip-test-skstresstester
 
 #===------------------------------------------------------------------------===#
 # LLDB build configurations