Import Darwin in files that use free

rdar://131965190

Author: ahoppen

Sources/SourceKitD/SKDRequestArray.swift

@@ -12,7 +12,9 @@
 
 import Csourcekitd
 
-#if canImport(Glibc)
+#if canImport(Darwin)
+import Darwin
+#elseif canImport(Glibc)
 import Glibc
 #elseif canImport(Musl)
 import Musl

Sources/SourceKitD/SKDRequestDictionary.swift

@@ -13,7 +13,9 @@
 import Csourcekitd
 import LSPLogging
 
-#if canImport(Glibc)
+#if canImport(Darwin)
+import Darwin
+#elseif canImport(Glibc)
 import Glibc
 #elseif canImport(Musl)
 import Musl

Sources/SourceKitD/SKDResponse.swift

@@ -13,7 +13,9 @@
 import Csourcekitd
 import LSPLogging
 
-#if canImport(Glibc)
+#if canImport(Darwin)
+import Darwin
+#elseif canImport(Glibc)
 import Glibc
 #elseif canImport(Musl)
 import Musl

Sources/SourceKitD/SKDResponseArray.swift

@@ -12,7 +12,9 @@
 
 import Csourcekitd
 
-#if canImport(Glibc)
+#if canImport(Darwin)
+import Darwin
+#elseif canImport(Glibc)
 import Glibc
 #elseif canImport(Musl)
 import Musl

Sources/SourceKitD/SKDResponseDictionary.swift

@@ -12,7 +12,9 @@
 
 import Csourcekitd
 
-#if canImport(Glibc)
+#if canImport(Darwin)
+import Darwin
+#elseif canImport(Glibc)
 import Glibc
 #elseif canImport(Musl)
 import Musl