Specifiy avr-gcc version

Author: sandeepmistry

platform.txt

@@ -18,7 +18,7 @@ compiler.warning_flags.more=-Wall
 compiler.warning_flags.all=-Wall -Wextra
 
 # Default "compiler.path" is correct, change only if you want to override the initial value
-compiler.path={runtime.tools.avr-gcc.path}/bin/
+compiler.path={runtime.tools.avr-gcc-5.4.0-atmel3.6.1-arduino2.path}/bin/
 compiler.c.cmd=avr-gcc
 compiler.c.flags=-c -g -Os {compiler.warning_flags} -std=gnu11 -ffunction-sections -fdata-sections -MMD -flto -fno-fat-lto-objects
 compiler.c.elf.flags={compiler.warning_flags} -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections