chore: disable warning about rwx segments

due to binutils version 2.39 provided within
arm-none-eabi-gcc-12.2.1
Enabled by default since this version.

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

Author: fpistm

Diff for: platform.txt

@@ -45,7 +45,7 @@ compiler.objcopy.eep.flags=-O ihex -j .eeprom --set-section-flags=.eeprom=alloc,
 compiler.elf2bin.flags=-O binary
 compiler.elf2hex.flags=-O ihex
 
-compiler.ldflags=
+compiler.ldflags=-Wl,--no-warn-rwx-segments
 compiler.size.cmd=arm-none-eabi-size
 compiler.define=-DARDUINO=