Merge remote-tracking branch 'upstream/master'

- Mikrokopter BLCTRL seems to be updated
 - HMC5883L calibration problem has been corrected.
    (This is because of RAM mis allocation?)
    See https://groups.google.com/forum/?fromgroups#!topic/px4users/yTYJiDBBKfo
 - Fixed wing control updated
    https://groups.google.com/forum/?fromgroups#!topic/px4users/s7owpvZN8UI
 - GPIO module has been removed.
 - STM32 DRV updated

makefiles/config_px4fmu_default.mk

@@ -56,6 +56,7 @@ MODULES		+= systemcmds/tests
 MODULES		+= modules/commander
 MODULES		+= modules/mavlink
 MODULES		+= modules/mavlink_onboard
+MODULES		+= modules/gpio_led
 
 #
 # Estimation modules (EKF / other filters)

makefiles/toolchain_gnu-arm-eabi.mk

@@ -219,7 +219,7 @@ endef
 define PRELINK
 	@$(ECHO) "PRELINK: $1"
 	@$(MKDIR) -p $(dir $1)
-	$(Q) $(LD) -Ur -o $1 $2 && $(OBJCOPY) --localize-hidden $1
+	$(Q) $(LD) -Ur -Map $1.map -o $1 $2 && $(OBJCOPY) --localize-hidden $1
 endef
 
 # Update the archive $1 with the files in $2
@@ -235,7 +235,7 @@ endef
 define LINK
 	@$(ECHO) "LINK:    $1"
 	@$(MKDIR) -p $(dir $1)
-	$(Q) $(LD) $(LDFLAGS) -o $1 --start-group $2 $(LIBS) $(EXTRA_LIBS) $(LIBGCC) --end-group
+	$(Q) $(LD) $(LDFLAGS) -Map $1.map -o $1 --start-group $2 $(LIBS) $(EXTRA_LIBS) $(LIBGCC) --end-group
 endef
 
 # Convert $1 from a linked object to a raw binary in $2
@@ -280,6 +280,7 @@ define BIN_TO_OBJ
 	$(Q) $(OBJCOPY) $2 \
 		--redefine-sym $(call BIN_SYM_PREFIX,$1)_start=$3 \
 		--redefine-sym $(call BIN_SYM_PREFIX,$1)_size=$3_len \
-		--strip-symbol $(call BIN_SYM_PREFIX,$1)_end
+		--strip-symbol $(call BIN_SYM_PREFIX,$1)_end \
+		--rename-section .data=.rodata
 	$(Q) $(REMOVE) $2.c $2.c.o
 endef