fix: fixes an issue with creation of crt Logger (#393)

Author: kneekey23

Packages/ClientRuntime/Sources/Networking/Http/CRT/CRTClientEngine.swift

@@ -13,7 +13,6 @@ import AwsCommonRuntimeKit
 public class CRTClientEngine: HttpClientEngine {
 
     private var logger: LogAgent
-    private var crtLogger: Logger
     private var connectionPools: [Endpoint: HttpClientConnectionManager] = [:]
     private let CONTENT_LENGTH_HEADER = "Content-Length"
     private let AWS_COMMON_RUNTIME = "AwsCommonRuntime"
@@ -27,7 +26,6 @@ public class CRTClientEngine: HttpClientEngine {
         self.maxConnectionsPerEndpoint = config.maxConnectionsPerEndpoint
         self.windowSize = config.windowSize
         self.logger = SwiftLogger(label: "CRTClientEngine")
-        self.crtLogger = Logger(pipe: stdout, level: .none, allocator: defaultAllocator)
     }
 
     private func createConnectionPool(endpoint: Endpoint) -> HttpClientConnectionManager {

Packages/ClientRuntime/Sources/Networking/Http/CRT/SDKDefaultIO.swift

@@ -7,9 +7,14 @@
 
 import AwsCommonRuntimeKit
 import class Foundation.ProcessInfo
+#if os(Linux)
+import Glibc
+#else
+import Darwin
+#endif
 
 public final class SDKDefaultIO {
-    static weak var privateShared: SDKDefaultIO? = nil
+    static weak var privateShared: SDKDefaultIO?
 
     // TODO: revisit this and verify that it is thread safe.
     public static var shared: SDKDefaultIO {
@@ -26,9 +31,11 @@ public final class SDKDefaultIO {
     public var hostResolver: DefaultHostResolver
     public var clientBootstrap: ClientBootstrap
     public var tlsContext: TlsContext
+    public var logger: Logger
 
     private init() {
         AwsCommonRuntimeKit.initialize()
+        self.logger = Logger(pipe: stdout, level: .none, allocator: defaultAllocator)
         self.eventLoopGroup = EventLoopGroup(threadCount: 0)
         self.hostResolver = DefaultHostResolver(eventLoopGroup: eventLoopGroup,
                                                 maxHosts: 8,