message: [test] Remove macOS-dependence from a test
diff: @@ -7,14 +7,10 @@ include $(LEVEL)/Makefile.rules
  MAIN_SWIFTFLAGS = $(SWIFTFLAGS) -lPlaygroundsRuntime -L. -I.
  -MACOSX_DEPLOYMENT_TARGET ?= 10.10
  -SWIFT_TRIPLE ?= -target x86_64-apple-macosx$(MACOSX_DEPLOYMENT_TARGET)
  -SDK_PATH ?= $(shell xcrun --show-sdk-path --sdk macosx)
  -
  all: libPlaygroundsRuntime.dylib PlaygroundStub
  libPlaygroundsRuntime.dylib: PlaygroundsRuntime.swift
  - $(SWIFTC) $(SWIFT_TRIPLE) $(SWIFTFLAGS) -sdk $(SDK_PATH) -Onone -module-name PlaygroundsRuntime -emit-library -o $@ $<
  + $(SWIFTC) $(SWIFTFLAGS) -Onone -module-name PlaygroundsRuntime -emit-library -o $@ $<
  PlaygroundStub: libPlaygroundsRuntime.dylib
  