Make llvm-go test dependency optional.

llvm-svn: 220503
diff --git a/llvm/test/CMakeLists.txt b/llvm/test/CMakeLists.txt
index 14e54b7..bdb5d79 100644
--- a/llvm/test/CMakeLists.txt
+++ b/llvm/test/CMakeLists.txt
@@ -32,7 +32,6 @@
           llvm-dis
           llvm-dwarfdump
           llvm-extract
-          llvm-go
           llvm-link
           llvm-lto
           llvm-mc
@@ -65,6 +64,10 @@
   set(LLVM_TEST_DEPENDS ${LLVM_TEST_DEPENDS} LLVMgold)
 endif()
 
+if(TARGET llvm-go)
+  set(LLVM_TEST_DEPENDS ${LLVM_TEST_DEPENDS} llvm-go)
+endif()
+
 add_lit_testsuite(check-llvm "Running the LLVM regression tests"
   ${CMAKE_CURRENT_BINARY_DIR}
   PARAMS llvm_site_config=${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg