Moved from arm-none-eabi-gcc 6-2017-q2-update to 8-2018-q4-major

Signed-off-by: Frederic.Pillon <[email protected]>

Author: fpistm

platform.txt

@@ -17,7 +17,7 @@ compiler.warning_flags.default=
 compiler.warning_flags.more=-Wall
 compiler.warning_flags.all=-Wall -Wextra
 
-compiler.path={runtime.tools.arm-none-eabi-gcc-6-2017-q2-update.path}/bin/
+compiler.path={runtime.tools.arm-none-eabi-gcc-8-2018-q4-major.path}/bin/
 
 compiler.S.cmd=arm-none-eabi-gcc
 compiler.c.cmd=arm-none-eabi-gcc