Address a resolved crasher

Author: DougGregor

validation-test/compiler_crashers/28796-result-second.swift renamed to validation-test/compiler_crashers_fixed/28796-result-second.swift

@@ -6,5 +6,5 @@
 // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
 // REQUIRES: asserts
-// RUN: not --crash %target-swift-frontend %s -emit-ir
+// RUN: not %target-swift-frontend %s -emit-ir
 class a<a{{{}}func b{extension{class a<a{{}class a:RangeReplaceableCollection