test: check static linking of FoundationNetworking

This was fixed in swiftlang/swift-corelibs-foundation#3135 for Swift 5.5, but regressed in Swift 5.6 and Swift 5.7

Author: MaxDesiatov

test/Misc/foundation_static_linking.swift

@@ -0,0 +1,6 @@
+// RUN: %target-swiftc_driver -static-stdlib -o %t/foundation_static_linking %s 
+// RUN: not --crash  %t/foundation_static_linking
+
+import Foundation
+
+_ = try! Data(contentsOf: URL(string: "http://httpbin.org/get")!)