Add an LLDB incremental buildbot preset

Author: adrian-prantl

utils/build-presets.ini

@@ -688,6 +688,22 @@ build-ninja
 skip-build-swift
 skip-build-cmark
 
+[preset: buildbot_incremental_lldb]
+lldb
+release
+test
+
+lit-args=-v --time-tests
+skip-build-benchmarks
+no-swift-stdlib-assertions
+lldb-use-system-debugserver
+
+skip-early-swift-driver
+skip-test-swift
+skip-test-cmark
+
+
+
 #===------------------------------------------------------------------------===#
 # A setting to run a buildbot that passes extra swift args when compiling
 # modules that match regexp.