Temporarily disable tests harder

Author: DougGregor

validation-test/compiler_crashers_fixed/26403-llvm-densemapbase-llvm-smalldensemap-std-pair-llvm-arrayref-std-pair-swift-identifier.swift

@@ -5,6 +5,8 @@
 // See http://swift.org/LICENSE.txt for license information
 // See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
-// RUN: not --crash %target-swift-frontend %s -parse
+// RUN: not %target-swift-frontend %s -parse
 class B<T where B:d
 class B<T>:B<T>
+
+// REQUIRES: disabled

validation-test/compiler_crashers_fixed/27618-swift-modulefile-getimportedmodules.swift

@@ -5,5 +5,8 @@
 // See http://swift.org/LICENSE.txt for license information
 // See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 
-// RUN: not --crash %target-swift-frontend %s -parse
+// RUN: not %target-swift-frontend %s -parse
 struct d<T where g:t{protocol a{func b<d where g.E=C{}}class C{class A{class B<T>:B<T>
+
+// REQUIRES: disabled
+