native_install: Update link to toolchain for Windows

This fixes error that occurred on Windows at newt create-image command:
Error: arm-none-eabi-objcopy
[..]pache-mynewt-nimble/apps/bttester/bttester.hex 64-bit address
0x4b4fa30000c000 out of range for Intel Hex file
1 file changed
tree: be821685ee93d46dd03f711bc26ee5324ddcd7a3
  1. .gitignore
  2. Makefile
  3. README.rst
  4. docs/
  5. doxygen-mynewt-core.xml