Add a netcontext variant of gethostbyname

Bug: 34953048
Test: Integration tests pass
Change-Id: I670427d67fde09d8e76ea6a920c90a1969230c4f
diff --git a/libc/libc.arm64.map b/libc/libc.arm64.map
index 34d3429..afcf8bb 100644
--- a/libc/libc.arm64.map
+++ b/libc/libc.arm64.map
@@ -1244,6 +1244,7 @@
     android_gethostbyaddrfornet;
     android_gethostbyaddrfornetcontext;
     android_gethostbynamefornet;
+    android_gethostbynamefornetcontext;
     free_malloc_leak_info;
     get_malloc_leak_info;
     gMallocLeakZygoteChild;