Update ACPI.cs #324

Job	Run time
build	3m 44s
test (BoxingTests.Kernel)	1m 46s
test (Cosmos.Compiler.Tests.TypeSystem.Kernel)	2m 25s
test (Cosmos.Compiler.Tests.Bcl.Kernel)	2m 54s
test (Cosmos.Compiler.Tests.Bcl.System.Kernel)	3m 40s
test (Cosmos.Compiler.Tests.Exceptions.Kernel)	1m 47s
test (Cosmos.Compiler.Tests.MethodTests.Kernel)	1m 42s
test (Cosmos.Compiler.Tests.SingleEchoTest.Kernel)	1m 47s
test (Cosmos.Kernel.Tests.Fat.Kernel)	3m 11s
test (Cosmos.Kernel.Tests.IO.Kernel)	1m 48s
test (SimpleStructsAndArraysTest.Kernel)	1m 48s
test (Cosmos.Kernel.Tests.DiskManager.Kernel)	1m 43s
test (GraphicTest.Kernel)	2m 22s
test (NetworkTest.Kernel)	50s
test (AudioTests.Kernel)	4m 4s
test (MemoryOperationsTest.Kernel)	1m 56s
test (ProcessorTests.Kernel)	1m 40s
	39m 7s

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