glibc: update perf_event.h to build lldb on linux. am: afe2b8609a

Original change: https://android-review.googlesource.com/c/platform/prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.17-4.8/+/1737994

Change-Id: I4be7d4357c1c91d0f30ae052f5ab08a0ce93b0c5