New toolchain 15 (#1709)

Co-authored-by: あく <alleteam@gmail.com>

scripts/toolchain/fbtenv.cmd

@@ -13,7 +13,7 @@ if not [%FBT_NOENV%] == [] (
     exit /b 0
 )
 
-set "FLIPPER_TOOLCHAIN_VERSION=12"
+set "FLIPPER_TOOLCHAIN_VERSION=15"
 set "FBT_TOOLCHAIN_ROOT=%FBT_ROOT%\toolchain\i686-windows"
 
 

scripts/toolchain/fbtenv.sh

@@ -5,7 +5,7 @@
 # public variables
 DEFAULT_SCRIPT_PATH="$(pwd -P)";
 SCRIPT_PATH="${SCRIPT_PATH:-$DEFAULT_SCRIPT_PATH}";
-FBT_TOOLCHAIN_VERSION="${FBT_TOOLCHAIN_VERSION:-"12"}";
+FBT_TOOLCHAIN_VERSION="${FBT_TOOLCHAIN_VERSION:-"15"}";
 FBT_TOOLCHAIN_PATH="${FBT_TOOLCHAIN_PATH:-$SCRIPT_PATH}";
 
 fbtenv_show_usage()