Add a netcontext variant of gethostbyname

Bug: 34953048
Test: Integration tests pass
Change-Id: I670427d67fde09d8e76ea6a920c90a1969230c4f
diff --git a/libc/libc.arm.map b/libc/libc.arm.map
index a74027a..b32f769 100644
--- a/libc/libc.arm.map
+++ b/libc/libc.arm.map
@@ -1496,6 +1496,7 @@
     android_gethostbyaddrfornet;
     android_gethostbyaddrfornetcontext;
     android_gethostbynamefornet;
+    android_gethostbynamefornetcontext;
     arc4random_addrandom; # arm x86 mips
     arc4random_stir; # arm x86 mips
     atexit; # arm