Revert "Bump GCC to 14.2.0"

This reverts commit e1211ba.

This is done in an abundance of caution due to
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117675 even though it
appears that this issue doesn't cause a crash.

mix.exs

@@ -69,7 +69,7 @@ defmodule NervesSystemOsd32mp1.MixProject do
     [
       {:nerves, "~> 1.11", runtime: false},
       {:nerves_system_br, "1.29.1", runtime: false},
-      {:nerves_toolchain_armv7_nerves_linux_gnueabihf, "~> 14.2.0", runtime: false},
+      {:nerves_toolchain_armv7_nerves_linux_gnueabihf, "~> 13.2.0", runtime: false},
       {:nerves_system_linter, "~> 0.4", only: [:dev, :test], runtime: false},
       {:ex_doc, "~> 0.22", only: :docs, runtime: false}
     ]

nerves_defconfig

@@ -3,8 +3,9 @@ BR2_cortex_a7=y
 BR2_TOOLCHAIN_EXTERNAL=y
 BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y
 BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD=y
-BR2_TOOLCHAIN_EXTERNAL_URL="https://github.com/nerves-project/toolchains/releases/download/v14.2.0/nerves_toolchain_armv7_nerves_linux_gnueabihf-linux_${shell uname -m}-14.2.0-6442318.tar.xz"
+BR2_TOOLCHAIN_EXTERNAL_URL="https://github.com/nerves-project/toolchains/releases/download/v13.2.0/nerves_toolchain_armv7_nerves_linux_gnueabihf-linux_${shell uname -m}-13.2.0-BE3EA83.tar.xz"
 BR2_TOOLCHAIN_EXTERNAL_CUSTOM_PREFIX="armv7-nerves-linux-gnueabihf"
+BR2_TOOLCHAIN_EXTERNAL_GCC_13=y
 BR2_TOOLCHAIN_EXTERNAL_HEADERS_5_4=y
 BR2_TOOLCHAIN_EXTERNAL_CUSTOM_GLIBC=y
 # BR2_TOOLCHAIN_EXTERNAL_INET_RPC is not set