Makefile short fix #309

Job	Run time
build	3m 31s
test (BoxingTests.Kernel)	1m 43s
test (Cosmos.Compiler.Tests.TypeSystem.Kernel)	2m 24s
test (Cosmos.Compiler.Tests.Bcl.Kernel)	2m 52s
test (Cosmos.Compiler.Tests.Bcl.System.Kernel)	3m 39s
test (Cosmos.Compiler.Tests.Exceptions.Kernel)	1m 45s
test (Cosmos.Compiler.Tests.MethodTests.Kernel)	1m 42s
test (Cosmos.Compiler.Tests.SingleEchoTest.Kernel)	1m 39s
test (Cosmos.Kernel.Tests.Fat.Kernel)	3m 0s
test (Cosmos.Kernel.Tests.IO.Kernel)	1m 47s
test (SimpleStructsAndArraysTest.Kernel)	1m 42s
test (Cosmos.Kernel.Tests.DiskManager.Kernel)	1m 48s
test (GraphicTest.Kernel)	2m 2s
test (NetworkTest.Kernel)	53s
test (AudioTests.Kernel)	4m 7s
test (MemoryOperationsTest.Kernel)	1m 55s
test (ProcessorTests.Kernel)	1m 37s
	38m 6s

Provide feedback