Merge remote-tracking branch 'qatar/master'

* qatar/master:
  build: Merge pthreads/w32threads OBJS declarations

Conflicts:
	libavcodec/Makefile
Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/Makefile

@@ -807,9 +807,7 @@ OBJS-$(CONFIG_TEXT2MOVSUB_BSF)            += movsub_bsf.o
 
 # thread libraries
 OBJS-$(HAVE_LIBC_MSVCRT)               += file_open.o
-OBJS-$(HAVE_PTHREADS)                  += pthread.o pthread_slice.o pthread_frame.o
-OBJS-$(HAVE_W32THREADS)                += pthread.o pthread_slice.o pthread_frame.o
-OBJS-$(HAVE_OS2THREADS)                += pthread.o pthread_slice.o pthread_frame.o
+OBJS-$(HAVE_THREADS)                   += pthread.o pthread_slice.o pthread_frame.o
 
 OBJS-$(CONFIG_FRAME_THREAD_ENCODER)    += frame_thread_encoder.o