Add filegroup BUILD file for glibc am: fb4e6a9f99 am: 6fd10926dd

Original change: https://android-review.googlesource.com/c/platform/prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.17-4.8/+/1887376

Change-Id: I40b243d112b2feb36a86cc016225127de29085ec