Add libz.a to the sysroot am: 927e93bcf2

Original change: https://android-review.googlesource.com/c/platform/external/musl/+/2075646

Change-Id: I1c7659a95390762064cfa5088833fc3b819d971a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>