Fix the i386 build by signing the temp dylib linked to by a test.

(cherry picked from commit d4d3d9f)

Author: gottesmm

test/Interpreter/switch_resilience.swift

@@ -1,5 +1,6 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-build-swift-dylib(%t/%target-library-name(resilient_struct)) %S/../Inputs/resilient_struct.swift -emit-module -emit-module-path %t/resilient_struct.swiftmodule -module-name resilient_struct -I%t -L%t -enable-library-evolution
+// RUN: %target-codesign %t/%target-library-name(resilient_struct)
 // RUN: %target-swiftc_driver -I %t -L %t %s -o %t/switch_resilience -lresilient_struct %target-rpath(%t)
 // RUN: %target-codesign %t/switch_resilience
 // RUN: %target-run %t/switch_resilience