[Dev] glibc version upgrade notification

Hello all developers、committers and maintainers of openEuler：

glibc 2.34 has released on Augest 1st, 2021，and the sig-Computing has upgraded the master branch's glibc version to the latest version 2.34 a few days ago.

Cause glibc provides the core libraries for the system, some other softwares may be need do some adaptation after this package's upgrading.

So let's happily finished this possible issues together. thanks all guys.