sdk: add a script for library update

Moves instructions from Readme file into a script

Author: igrr

tools/sdk/lib/README.md

@@ -1,25 +1,7 @@
 ## Updating SDK libraries
 
-After updating SDK libraries to a new version, do the following changes.
-
-
-Remove mem_manager.o from libmain.a to use custom heap implementation, and time.o to fix redefinition of time-related functions:
-
-```bash
-xtensa-lx106-elf-ar -d libmain.a mem_manager.o
-xtensa-lx106-elf-ar -d libmain.a time.o
-```
-
-Rename `hostname` and `default_hostname` symbols:
-
-```bash
-xtensa-lx106-elf-ar x libmain.a eagle_lwip_if.o user_interface.o
-xtensa-lx106-elf-objcopy --redefine-sym hostname=wifi_station_hostname user_interface.o 
-xtensa-lx106-elf-objcopy --redefine-sym hostname=wifi_station_hostname eagle_lwip_if.o 
-xtensa-lx106-elf-objcopy --redefine-sym default_hostname=wifi_station_default_hostname user_interface.o 
-xtensa-lx106-elf-objcopy --redefine-sym default_hostname=wifi_station_default_hostname eagle_lwip_if.o 
-xtensa-lx106-elf-ar r libmain.a eagle_lwip_if.o user_interface.o 
-```
+- Copy .a files from SDK `lib` directory to this directory
+- Run `fix_sdk_libs.sh`
 
 ## Updating libstdc++
 

tools/sdk/lib/fix_sdk_libs.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+set -e
+
+# Remove mem_manager.o from libmain.a to use custom heap implementation,
+# and time.o to fix redefinition of time-related functions:
+xtensa-lx106-elf-ar d libmain.a mem_manager.o
+xtensa-lx106-elf-ar d libmain.a time.o
+
+# Rename `hostname` and `default_hostname` symbols:
+xtensa-lx106-elf-ar x libmain.a eagle_lwip_if.o user_interface.o
+xtensa-lx106-elf-objcopy --redefine-sym hostname=wifi_station_hostname user_interface.o 
+xtensa-lx106-elf-objcopy --redefine-sym hostname=wifi_station_hostname eagle_lwip_if.o 
+xtensa-lx106-elf-objcopy --redefine-sym default_hostname=wifi_station_default_hostname user_interface.o 
+xtensa-lx106-elf-objcopy --redefine-sym default_hostname=wifi_station_default_hostname eagle_lwip_if.o 
+xtensa-lx106-elf-ar r libmain.a eagle_lwip_if.o user_interface.o 
+rm eagle_lwip_if.o user_interface.o