Bootstrap: Stage 2 preset

Adding a stage-2 preset. This preset adds SwiftPM and XCTest to the
built products. The stage-1 preset could likely build all of the
product, but because the stage-1 compiler was built without several
optimizations available in the stage-0 compiler, this compiler will not
be as performant as a separate stage-2 compiler.

(cherry picked from commit 4130bca)

Author: etcwilde

utils/build-presets.ini

@@ -3195,3 +3195,39 @@ install-llvm
 install-swift
 install-foundation
 install-libdispatch
+
+[preset: bootstrap_stage2]
+mixin-preset=mixin_buildbot_linux,no_test
+bootstrapping=hosttools
+
+release
+
+skip-early-swift-driver
+
+llbuild
+xctest
+swiftpm
+
+swift-include-tests=0
+llvm-include-tests=0
+
+
+foundation
+libdispatch
+
+skip-build-benchmarks
+skip-test-cmark
+
+build-subdir=%(build_subdir)s
+install-destdir=%(install_destdir)s
+
+swift-install-components=autolink-driver;compiler;clang-resource-dir-symlink;stdlib;sdk-overlay;toolchain-tools;license
+llvm-install-components=llvm-ar;llvm-ranlib;clang;clang-resource-headers;compiler-rt;clang-features-file;lld
+
+install-llvm
+install-swift
+install-foundation
+install-libdispatch
+install-llbuild
+install-swiftpm
+install-xctest