[Preset] Add new preset to support automerger testing

Author: shahmishal

utils/build-presets.ini

@@ -1368,6 +1368,49 @@ tvos
 watchos
 swift-stdlib-build-type=Release
 
+#===------------------------------------------------------------------------===#
+# Test Swift/LLVM Project only on macOS and iOS
+#===------------------------------------------------------------------------===#
+
+[preset: buildbot,tools=RA,stdlib=RA,platforms=macOS_iOS]
+mixin-preset=
+    buildbot_incremental_base_all_platforms
+    lldb-smoketest,tools=RA
+    mixin_buildbot_install_components_with_clang
+
+build-subdir=buildbot_incremental
+
+# Skip watchOS and tvOS
+skip-build-watchos
+skip-build-tvos
+
+# Build Release without debug info, because it is faster to build.
+release
+assertions
+
+build-swift-stdlib-unittest-extra
+
+libcxx
+
+# Install swift and libcxx
+install-swift
+install-libcxx
+
+# Build Playground support
+playgroundsupport
+
+dash-dash
+
+# Run the SIL verifier after each transform when building swift files
+sil-verify-all
+
+# Don't run host tests for iOS, tvOS and watchOS platforms to make the build
+# faster.
+skip-test-ios-host
+skip-test-tvos-host
+skip-test-watchos-host
+
+
 #===------------------------------------------------------------------------===#
 # Test all platforms on OS X builder
 #===------------------------------------------------------------------------===#