Add llvm-dis dependency to check-clang.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@292450 91177308-0d34-0410-b5e6-96231b3b80d8

test/CMakeLists.txt

@@ -79,6 +79,7 @@ if( NOT CLANG_BUILT_STANDALONE )
     FileCheck count not
     llc
     llvm-bcanalyzer
+    llvm-dis
     llvm-nm
     llvm-objdump
     llvm-profdata