Broaden the set of benchmarks tagged under .cpubench

These have all shown to be interesting, relevant, stable, and
optimized well enough by the compiler to be useful for cpu performance
tracking.

Author: atrick

benchmark/single-source/DataBenchmarks.swift

@@ -13,7 +13,7 @@
 import TestsUtils
 import Foundation
 
-let d: [BenchmarkCategory] =  [.validation, .api, .Data]
+let d: [BenchmarkCategory] =  [.validation, .api, .Data, .cpubench]
 
 public let DataBenchmarks = [
   BenchmarkInfo(name: "DataCreateEmpty",

benchmark/single-source/DictionarySwap.swift

@@ -19,7 +19,7 @@ let numberMap = Dictionary(uniqueKeysWithValues: zip(1...size, 1...size))
 let boxedNums = (1...size).lazy.map { Box($0) }
 let boxedNumMap = Dictionary(uniqueKeysWithValues: zip(boxedNums, boxedNums))
 
-let t: [BenchmarkCategory] = [.validation, .api, .Dictionary]
+let t: [BenchmarkCategory] = [.validation, .api, .Dictionary, .cpubench]
 
 public let DictionarySwap = [
   BenchmarkInfo(name: "DictionarySwap",

benchmark/single-source/NIOChannelPipeline.swift

@@ -14,7 +14,7 @@ import TestsUtils
 
 // Mini benchmark implementing the gist of SwiftNIO's ChannelPipeline as
 // implemented by NIO 1 and NIO 2.[01]
-let t: [BenchmarkCategory] = [.runtime, .refcount]
+let t: [BenchmarkCategory] = [.runtime, .refcount, .cpubench]
 let N = 100
 
 public let NIOChannelPipeline = [

benchmark/single-source/ObjectiveCNoBridgingStubs.swift

@@ -21,7 +21,7 @@ import Foundation
 import ObjectiveCTests
 #endif
 
-let t: [BenchmarkCategory] = [.validation, .bridging]
+let t: [BenchmarkCategory] = [.validation, .bridging, .cpubench]
 
 public let ObjectiveCNoBridgingStubs = [
   BenchmarkInfo(name: "ObjectiveCBridgeStubToNSStringRef",

benchmark/single-source/ReversedCollections.swift

@@ -16,7 +16,7 @@ public let ReversedCollections = [
   BenchmarkInfo(name: "ReversedArray2", runFunction: run_ReversedArray, tags: [.validation, .api, .Array],
       setUpFunction: { blackHole(arrayInput) },
       tearDownFunction: { arrayInput = nil }),
-  BenchmarkInfo(name: "ReversedBidirectional", runFunction: run_ReversedBidirectional, tags: [.validation, .api]),
+  BenchmarkInfo(name: "ReversedBidirectional", runFunction: run_ReversedBidirectional, tags: [.validation, .api, .cpubench]),
   BenchmarkInfo(name: "ReversedDictionary2", runFunction: run_ReversedDictionary, tags: [.validation, .api, .Dictionary],
       setUpFunction: { blackHole(dictionaryInput) },
       tearDownFunction: { dictionaryInput = nil })

benchmark/single-source/SortLargeExistentials.swift

@@ -17,7 +17,7 @@ import TestsUtils
 public let SortLargeExistentials = BenchmarkInfo(
   name: "SortLargeExistentials",
   runFunction: run_SortLargeExistentials,
-  tags: [.validation, .api, .algorithm],
+  tags: [.validation, .api, .algorithm, .cpubench],
   legacyFactor: 100)
 
 protocol LetterKind {

benchmark/single-source/StackPromo.swift

@@ -14,7 +14,7 @@ import TestsUtils
 public let StackPromo = BenchmarkInfo(
   name: "StackPromo",
   runFunction: run_StackPromo,
-  tags: [.regression],
+  tags: [.regression, .cpubench],
   legacyFactor: 100)
 
 protocol Proto {

benchmark/single-source/StringReplaceSubrange.swift

@@ -12,7 +12,7 @@
 
 import TestsUtils
 
-let tags: [BenchmarkCategory] = [.validation, .api, .String]
+let tags: [BenchmarkCategory] = [.validation, .api, .String, .cpubench]
 
 public let StringReplaceSubrange = [
   BenchmarkInfo(