Rename win32-xtensa-lx106-elf-gb404fb9.tgz.sha to win32-xtensa-lx106-elf-gb404fb9-2.tgz.sha

Build script was looking for win32-xtensa-lx106-elf-gb404fb9-2.tgz.sha due to change in file names in: 4a28616

Since it could not find this file, it was failing the checksum test and halting the build as a result.

Author: h4rm0n1c