* fixed double cc110x_ng entry in drivers makefile

* tidied up sys directory

drivers/makefile

@@ -18,9 +18,6 @@ endif
 ifneq (,$(findstring gps_ublox,$(USEMODULE)))
     DIRS += gps_ublox
 endif
-ifneq (,$(findstring cc110x_ng,$(USEMODULE)))
-    DIRS += cc110x_ng
-endif
 
 all:
 	@for i in $(DIRS) ; do $(MAKE) -C $$i ; done ;

sys/makefile

@@ -23,6 +23,9 @@ endif
 ifneq (,$(findstring mprint,$(USEMODULE)))
     DIRS += mprint
 endif
+ifneq (,$(findstring ping,$(USEMODULE)))
+    DIRS += ping
+endif
 ifneq (,$(findstring ps,$(USEMODULE)))
     DIRS += ps
 endif
@@ -47,6 +50,9 @@ endif
 ifneq (,$(findstring shell_commands,$(USEMODULE)))
     DIRS += shell/commands
 endif
+ifneq (,$(findstring swtimer,$(USEMODULE)))
+    DIRS += swtimer
+endif
 ifneq (,$(findstring timex,$(USEMODULE)))
     DIRS += timex
 endif

sys/ping/makefile

+INCLUDES = -I../include -I$(RIOTBASE)/core/include/ -I$(RIOTBASE)/drivers/include
+MODULE =ping
+
+include $(RIOTBASE)/makefile.base
+

sys/swtimer/makefile

+INCLUDES = -I../include -I$(RIOTBASE)/core/include/ -I$(RIOTBASE)/drivers/include
+MODULE =swtimer
+
+include $(RIOTBASE)/makefile.base
+