Updated toolchains with DSM 5.0 Beta update from syno

Update Makefile
Removed useless comments

More fixes as I realized some my digests were wrong due to the fact that some of the toolchain archives have the same name.

Updated toolchains with DSM 5.0 version
Merge pull request #865 from jdel/toolchains

Updated toolchains with DSM 5.0 Beta update from syno