esp8266: fix filesystem build breakage for flash based fs

Not a feature that's generally used and it seems to have not entirely
survived the conversion.

It now builds the bits and make burn appears to run if the option for
filesystem as well is uncommented. Make fburn not and appears to be obsolete

Kernel/platform/platform-esp8266/Makefile

@@ -77,7 +77,7 @@ filesystem.img::
 
 filesystem.ftl: filesystem.img
 	# -s is the flash size in kilobytes; the kernel and boot loader takes the first 64kB.
-	../../../../Standalone/mkftl -s 1984 -e 0x1000 -p 512 -g 10 filesystem.img -o filesystem.ftl
+	../../../Standalone/mkftl -s 1984 -e 0x1000 -p 512 -g 10 filesystem.img -o filesystem.ftl
 
 filesystem.elf: filesystem.ftl
 	xtensa-lx106-elf-objcopy -I binary -O elf32-xtensa-le --change-section-vma .data=0x40220000 filesystem.ftl filesystem.elf
@@ -95,7 +95,7 @@ image: image.elf
 burn: image
 	# You can use qio on a lot of parts but if it doesn't work try dio. For the ESP8285 use dout
 	esptool --port /dev/ttyUSB0 write_flash 0x00000 image.elf-0x00000.bin 0x10000 image.elf-0x10000.bin -fs 4MB -ff 80m -fm dio
-	#esptool --port /dev/ttyUSB0 write_flash 0x00000 image.elf-0x00000.bin 0x10000 image.elf-0x10000.bin 0x100000 ../../filesystem.ftl -ff 80m -fm dout
+	#esptool --port /dev/ttyUSB0 write_flash 0x00000 image.elf-0x00000.bin 0x10000 image.elf-0x10000.bin 0x100000 filesystem.ftl -ff 80m -fm dout
 	#esptool --port /dev/ttyUSB0 write_flash 0x00000 image.elf-0x00000.bin -ff 80m -fm dout
 
 clean: