Allow use of LED16 for generic boards

Generic boards can have their LEDs on pins 0...16 inclusive, so ensure
that the range we generate in boards.txt is inclusive.

Fixes esp8266#5817

Author: earlephilhower

boards.txt

@@ -365,6 +365,8 @@ generic.menu.led.14=14
 generic.menu.led.14.build.led=-DLED_BUILTIN=14
 generic.menu.led.15=15
 generic.menu.led.15.build.led=-DLED_BUILTIN=15
+generic.menu.led.16=16
+generic.menu.led.16.build.led=-DLED_BUILTIN=16
 generic.menu.sdk.nonosdk222_100=nonos-sdk 2.2.1+100 (testing)
 generic.menu.sdk.nonosdk222_100.build.sdk=NONOSDK22y
 generic.menu.sdk.nonosdk221=nonos-sdk 2.2.1 (legacy)
@@ -639,6 +641,8 @@ esp8285.menu.led.14=14
 esp8285.menu.led.14.build.led=-DLED_BUILTIN=14
 esp8285.menu.led.15=15
 esp8285.menu.led.15.build.led=-DLED_BUILTIN=15
+esp8285.menu.led.16=16
+esp8285.menu.led.16.build.led=-DLED_BUILTIN=16
 esp8285.menu.ip.lm2f=v2 Lower Memory
 esp8285.menu.ip.lm2f.build.lwip_include=lwip2/include
 esp8285.menu.ip.lm2f.build.lwip_lib=-llwip2-536-feat

tools/boards.txt.py

@@ -1327,7 +1327,7 @@ def led (default,max):
                 ('.menu.led.' + str(default), str(default)),
                 ('.menu.led.' + str(default) + '.build.led', '-DLED_BUILTIN=' + str(default)),
           ]);
-    for i in range(0,max):
+    for i in range(0,max+1): # Make range incluside of max (16), since there are really 16 GPIOS not 15
         if not i == default:
             led.update(
                 collections.OrderedDict([