Fix PIO assembler errors

earlephilhower · earlephilhower · commit 137ba8f74063 · 2018-09-26T05:46:19.000-07:00
diff --git a/libraries/ESP8266WiFi/src/BearSSLThunks.S b/libraries/ESP8266WiFi/src/BearSSLThunks.S
@@ -40,6 +40,8 @@ _saveStack: .word 0x00000000
  * architecture.
  */
 .text
+.literal_position
+
 .global SetThunkStackEnd
 .type SetThunkStackEnd, @function
 .align 4
