[test] Use %target-run to run generated executable

Without %target-run, DYLD_LIBRARY_PATH won’t apply and the target will try to load OS-supplied libraries rather than the ones we just built even if use_os_stdlib isn’t enabled.

Author: lorentey

test/Interpreter/objc_class_properties_runtime.swift

@@ -3,7 +3,7 @@
 // RUN: %clang -arch x86_64 -mmacosx-version-min=10.11 -isysroot %sdk -fobjc-arc %S/Inputs/ObjCClasses/ObjCClasses.m -c -o %t/ObjCClasses.o
 
 // RUN: %swiftc_driver -target $(echo '%target-triple' | sed -E -e 's/macosx10.(9|10).*/macosx10.11/') -sdk %sdk -I %S/Inputs/ObjCClasses/ %t/ObjCClasses.o %s -o %t/a.out
-// RUN: %t/a.out
+// RUN: %target-run %t/a.out
 
 // REQUIRES: OS=macosx
 // REQUIRES: executable_test