Merge pull request #767 from pgollor/esp8266

fix upload size for gerneric 4m1m

Author: igrr

boards.txt

@@ -119,7 +119,7 @@ generic.menu.FlashSize.4M1M.build.spiffs_start=0x300000
 generic.menu.FlashSize.4M1M.build.spiffs_end=0x3FB000
 generic.menu.FlashSize.4M1M.build.spiffs_blocksize=8192
 generic.menu.FlashSize.4M1M.build.spiffs_pagesize=256
-generic.menu.FlashSize.4M1M.upload.maximum_size=3044464
+generic.menu.FlashSize.4M1M.upload.maximum_size=1044464
 
 generic.menu.FlashSize.4M=4M (3M SPIFFS)
 generic.menu.FlashSize.4M.build.flash_size=4M