[lldb/cmake] Fix linking of lldbSymbolHelpers for 9cb222e

I didn't find this locally because I have a /usr/include/gtest which is
similar enough to the bundled one to make things appear to work.

Author: labath

lldb/unittests/TestingSupport/Symbol/CMakeLists.txt

@@ -1,4 +1,15 @@
 set_property(DIRECTORY PROPERTY EXCLUDE_FROM_ALL ON)
 add_lldb_library(lldbSymbolHelpers
   YAMLModuleTester.cpp
+
+  LINK_LIBS
+    lldbCore
+    lldbHost
+    lldbPluginExpressionParserClang
+    lldbPluginSymbolFileDWARF
+    lldbPluginTypeSystemClang
+    lldbUtilityHelpers
+
+  LINK_COMPONENTS
+    ObjectYAML
   )