Pandora: Fixed referring to no more existing atomic source file in Makefile.
--- a/Makefile.pandora Mon Jul 18 22:03:47 2016 +0200
+++ b/Makefile.pandora Tue Jul 19 21:01:13 2016 +0200
@@ -19,7 +19,7 @@
./src/thread/pthread/SDL_systhread.c ./src/thread/pthread/SDL_syssem.c \
./src/thread/pthread/SDL_sysmutex.c ./src/thread/pthread/SDL_syscond.c \
./src/joystick/linux/*.c ./src/haptic/linux/*.c ./src/timer/unix/*.c \
- ./src/atomic/linux/*.c ./src/filesystem/unix/*.c \
+ ./src/atomic/*.c ./src/filesystem/unix/*.c \
./src/video/pandora/SDL_pandora.o ./src/video/pandora/SDL_pandora_events.o ./src/video/x11/*.c