Unify LD versions for Tizen repositories by adding " Linaro 2015_01-2"

Unify LD versions for Tizen repositories by adding " Linaro 2015_01-2"

Fix detection of GNU LD version in GCC's scripts

GCC's configure scripts are confused by YYYY.MM format of Linaro releases
and mistake YYYY for major version (currently 2) and MM for minor version
(currently 25).  This, in turn, makes GCC think that GNU LD doesn't support
plugins, which disables -fuse-linker-plugin functionality used by LTO.

This problem was already fixed before, and there is a comment about avoiding
"." in the BFD_VERSION_STRING, but, for reasons I can't explain, the problem
occurred again.  So fixing it ... again.

Change-Id: Ic255a09f384c22fa92cde620ad4567fb8715a331