Merge pull request #42 from Air-duino/fix/LinkerWarning

fix: 修复链接报错

Author: HalfSweet

platform.txt

@@ -45,7 +45,9 @@ compiler.elf2bin.flags=-O binary
 compiler.elf2hex.flags=-O ihex
 
 # 编译器的链接参数compiler.ldflags
-compiler.ldflags=
+
+## 消除链接时候的`LOAD segment with RWX permissions`警告
+compiler.ldflags=-Wl,--no-warn-rwx-segments
 compiler.size.cmd=arm-none-eabi-size
 compiler.define=-DARDUINO=