An previous commit http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=fbdbe8d1ec6ca269c5121a45d4684449664b6d5d breaks the function of toolchain_create_sdk_siteconfig, so the eglibc siteconfig file is not populated into the meta-toolchain.
Patch sent for review at http://git.yoctoproject.org/cgit/cgit.cgi/poky-contrib/commit/?h=llu/siteconfig&id=5d23ea40f1f69d0f8b3ce11262c9f16750405313
Fixed in commit http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=8447aa2faef3f4bdb544ab4db45a8e64189ef099
Verified in 1.2 master with the latest commit c936fca6e163bc19bc08cbd0036b31ca6f6c3ed6.