am 06c9662a: am 255789e4: Merge "Restore tkill for LP32."

* commit '06c9662a2feddc86a37d3adb3e468d57067c3714':
  Restore tkill for LP32.
diff --git a/libc/bionic/ndk_cruft.cpp b/libc/bionic/ndk_cruft.cpp
index 46cc1f0..4900a8a 100644
--- a/libc/bionic/ndk_cruft.cpp
+++ b/libc/bionic/ndk_cruft.cpp
@@ -222,4 +222,9 @@
   return __futex(ftx, FUTEX_WAIT, value, timeout);
 }
 
+// Unity's libmono uses this.
+extern "C" int tkill(pid_t tid, int sig) {
+  return syscall(__NR_tkill, tid, sig);
+}
+
 #endif