[pseudo] Include missing `count` in test deps.

We don't use this for testing, but one of the lit python modules requires it :-\

After this, check-clang-pseudo passes with a clean build tree.

clang-tools-extra/pseudo/test/CMakeLists.txt

@@ -3,7 +3,7 @@ set(CLANG_PSEUDO_TEST_DEPS
   ClangPseudoTests
   )
 
-foreach(dep FileCheck not)
+foreach(dep FileCheck not count)
   if(TARGET ${dep})
     list(APPEND CLANG_PSEUDO_TEST_DEPS ${dep})
   endif()