Marking plugin SDK part of the build during ENABLED_TESTS, bug 112255 r=cls

modules/plugin/Makefile.in

@@ -55,6 +55,12 @@ DIRS		+= tools/tester/common tools/tester/os2
 endif
 endif
  
+ifdef ENABLE_TESTS
+ifeq (,$(filter WINNT, Darwin, Linux,$(OS_ARCH)))
+DIRS		+= tools/sdk
+endif
+endif
+
 include $(topsrcdir)/config/rules.mk
 
 $(DIST)/bin/plugins: