cmake: Set minimum required Zephyr SDK version to 0.13

In order to use the newlib retagetable locking interface (for thread
safety), which requires the newlib multi-threading feature to be
enabled, the Zephyr SDK 0.13.0 or above must be used.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

cmake/verify-toolchain.cmake

@@ -16,11 +16,7 @@
 # FORMAT=json: Print the output as a json formatted string, useful for Python
 
 # This is the minimum required Zephyr-SDK version which supports CMake package
-if("${ARCH}" STREQUAL "arm64")
-  set(TOOLCHAIN_ZEPHYR_MINIMUM_REQUIRED_VERSION 0.12.4)
-else()
-  set(TOOLCHAIN_ZEPHYR_MINIMUM_REQUIRED_VERSION 0.12)
-endif()
+set(TOOLCHAIN_ZEPHYR_MINIMUM_REQUIRED_VERSION 0.13)
 
 # Set internal variables if set in environment.
 if(NOT DEFINED ZEPHYR_TOOLCHAIN_VARIANT)