Set BOARD_HARDWARE_PATH correctly for run-docker on macOS

Because ARDUINO_LOCAL_LIB_PATH was being set to a default value for other
operating systems before checking the OS version, it would never get set
correctly for macOS (unless it was already set externally). This change fixes
that problem so that it's no longer necessary to set BOARD_HARDWARE_PATH
externally when executing `run-docker`.

Signed-off-by: Michael Richters <gedankenexperimenter@gmail.com>

bin/run-docker

@@ -4,12 +4,12 @@ set -e
 
 uname_S=$(uname -s 2>/dev/null || echo not)
 
-ARDUINO_LOCAL_LIB_PATH="${ARDUINO_LOCAL_LIB_PATH:-${HOME}/Arduino}"
-
 if [ "${uname_S}" = "Darwin" ]; then
     ARDUINO_LOCAL_LIB_PATH="${ARDUINO_LOCAL_LIB_PATH:-${HOME}/Documents/Arduino}"
     # This stops macos from copying resource forks into thigns like tar
     export COPYFILE_DISABLE=true
+else
+    ARDUINO_LOCAL_LIB_PATH="${ARDUINO_LOCAL_LIB_PATH:-${HOME}/Arduino}"
 fi
 
 BOARD_HARDWARE_PATH="${BOARD_HARDWARE_PATH:-${ARDUINO_LOCAL_LIB_PATH}/hardware}"