We do not google test utils if we disabled LLVM_INCLUDE_TESTS

[v.g.vassilev]

Summary

We embed llvm in a framework that provides the gtest target causing issues when we configure.

[rnk]

lgtm

[v.g.vassilev]

Landed in r305088.

CMakeLists.txt

 
 if( LLVM_INCLUDE_UTILS )
   add_subdirectory(utils/FileCheck)
   add_subdirectory(utils/PerfectShuffle)
   add_subdirectory(utils/count)
   add_subdirectory(utils/not)
   add_subdirectory(utils/llvm-lit)
   add_subdirectory(utils/yaml-bench)
-  add_subdirectory(utils/unittest)
 else()
   if ( LLVM_INCLUDE_TESTS )
     message(FATAL_ERROR "Including tests when not building utils will not work.
     Either set LLVM_INCLUDE_UTILS to On, or set LLVM_INCLDE_TESTS to Off.")
   endif()
 endif()
 
 # Use LLVM_ADD_NATIVE_VISUALIZERS_TO_SOLUTION instead of LLVM_INCLUDE_UTILS because it is not really a util
if(EXISTS ${LLVM_MAIN_SRC_DIR}/projects/test-suite AND TARGET clang)
     llvm_ExternalProject_Add(test-suite ${LLVM_MAIN_SRC_DIR}/projects/test-suite
       USE_TOOLCHAIN
       EXCLUDE_FROM_ALL
       NO_INSTALL
       ALWAYS_CLEAN)
   endif()
   add_subdirectory(test)
   add_subdirectory(unittests)
+  if( LLVM_INCLUDE_UTILS )
+    add_subdirectory(utils/unittest)
+  endif()
+
   if (WIN32)
     # This utility is used to prevent crashing tests from calling Dr. Watson on
     # Windows.
     add_subdirectory(utils/KillTheDoctor)
   endif()
 
   # Add a global check rule now that all subdirectories have been traversed
   # and we know the total set of lit testsuites.