automatically pull in unity helper into tests when specified in both example and cmock's includes.

examples/temp_sensor/rakefile_helper.rb

@@ -185,8 +185,8 @@ module RakefileHelpers
       obj_list = []
 
       # Detect dependencies and build required required modules
-      header_list = extract_headers(test) + ['cmock.h']
-      header_list.each do |header|
+      header_list = extract_headers(test) + ['cmock.h'] + [ cfg[:cmock][:unity_helper_path] ]
+      header_list.compact.uniq.each do |header|
 
         #create mocks if needed
         if (header =~ /Mock/)