Fix system/libfmq compiling against musl am: 02ec6a2f43 am: 340b3045a6 am: 7b71c8981f am: 385ff9497c am: 8853fefbab

Original change: https://android-review.googlesource.com/c/platform/system/libfmq/+/1826813

Change-Id: I129cbff85560e601151187c2480004b96eea46eb
tree: 10ccbca969b8e5bcb3ddb06eb2971759dff52055
  1. base/
  2. benchmarks/
  3. fuzzer/
  4. include/
  5. tests/
  6. Android.bp
  7. EventFlag.cpp
  8. FmqInternal.cpp
  9. OWNERS
  10. PREUPLOAD.cfg
  11. TEST_MAPPING