Add prlimit to LP32.

Bug: http://b/24918750
Change-Id: I0151cd66ccf79a6169610de35bb9c288c0fa4917
diff --git a/libc/libc.x86.map b/libc/libc.x86.map
index 6f60524..544ee13 100644
--- a/libc/libc.x86.map
+++ b/libc/libc.x86.map
@@ -1275,6 +1275,7 @@
     getgrnam_r;
     preadv;
     preadv64;
+    prlimit; # arm mips x86
     pwritev;
     pwritev64;
     scandirat;