[edk2][edk2-libc/master V2]Request to add new edk2-libc repository

["Michael D Kinney" <michael.d.kinney@intel.com>]

Hello,

New in V2
=========
* Add details to Readme.md on how the history for these
  three packages was exported from the edk2 repository
  using git filter-branch.
* Remove redundant content in edk2-libc Readme.md and
  Maintainters.txt and instead point to content in edk2
  repository.
* Mark the sections of Maintainers.txt that need further
  discussion as TBD.
* Update installation and build instructions in the 
  Readme.txt files in AppPkg and StdLib.
* Fix a warning in StdLib when building with VS2015.
========

There were no objections to the following RFC to add
a new edk2-libc repository.

    https://edk2.groups.io/g/devel/message/35211

I have entered the following Feature Request Bugzilla

    https://bugzilla.tianocore.org/show_bug.cgi?id=1734

I have posted a version of the edk2-libc repository for
review at the following location.  It includes all the
history for the three packages from the edk2 repository.

    https://github.com/mdkinney/edk2-libc/tree/master_V2

Please review this branch.  There are 3 additional commits:

* Update the Readme.md and Maintainers.txt that scopes them
  to this new edk2-libc repository.

  https://github.com/mdkinney/edk2-libc/commit/62cfdf929f15edba7f7bcbbdb01e4dc50d2c81a7

* Update Readme.txt in AppPkg and StdLib to describe how to
  install both the edk2-libc repository and the edk2
  repository and set PACKAGES_PATH to support builds.

  https://github.com/mdkinney/edk2-libc/commit/d004f93626b3bb962c24500db6ec7284db074c9a

* Fix a minor issue that removes warnings when building 
  edk2-libc packages with VS2015 toolchains.

  https://github.com/mdkinney/edk2-libc/commit/145d262e94182a6b4631e0b6df5bc5d67e209931

Best regards,

Mike