bug 749678 - inconditionally export thread_helper.h, gfx/gl requires it - r=bjacob

This is a VERY TEMPORARY fix until bug 753119 lands. The only reason why it's acceptable
is that bug 753119 will take it out very soon. Non-profiler code should not use profiler headers.

tools/profiler/Makefile.in

@@ -44,12 +44,12 @@ VPATH       = $(srcdir)
 
 include $(DEPTH)/config/autoconf.mk
 
-EXPORTS = sampler.h
+EXPORTS = sampler.h \
+  thread_helper.h
 
 ifdef MOZ_ENABLE_PROFILER_SPS
 EXPORTS += \
   sps_sampler.h \
-  thread_helper.h \
   shared-libraries.h \
   $(NULL)