link to PUYA SPIFF issue added

radimkeseg · radimkeseg · commit 156c80fac1c1 · 2019-03-21T00:13:48.000+01:00
see esp8266/Arduino#4061 (comment)
diff --git a/PUYA mem chips issue.txt b/PUYA mem chips issue.txt
@@ -0,0 +1 @@
+see https://github.com/esp8266/Arduino/issues/4061#issuecomment-422849071

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+see https://github.com/esp8266/Arduino/issues/4061#issuecomment-422849071`