Fix building libprocinfo against musl

Musl libc provides a definition of gettid().

Bug: 190084016
Test: m USE_HOST_MUSL=true libpcap
Change-Id: Ie8c0eb85c640ab7e0e5cfe6bcabf8bcd532e63ac
1 file changed
tree: 8a06fd879dbc0d82651173c641e589fc9f90ea85
  1. include/
  2. testdata/
  3. Android.bp
  4. OWNERS
  5. process.cpp
  6. process_map_benchmark.cpp
  7. process_map_test.cpp
  8. process_test.cpp
  9. TEST_MAPPING