cmake: When adding lit testsuites, ignore Output directories

With in-tree builds we can get Output directories scattered among our
tests. Recursing into those to find tests doesn't make sense.

Thanks to nlewycky for noticing this!

llvm-svn: 276667

llvm/cmake/modules/AddLLVM.cmake

@@ -1138,7 +1138,8 @@ function(add_lit_testsuites project directory)
         continue()
       endif()
       string(FIND ${lit_suite} Inputs is_inputs)
-      if (NOT is_inputs EQUAL -1)
+      string(FIND ${lit_suite} Output is_output)
+      if (NOT (is_inputs EQUAL -1 AND is_output EQUAL -1))
         continue()
       endif()