libnl3: Fix build on musl.

core/libnl3/build

@@ -1,5 +1,7 @@
 #!/bin/sh -e
 
+patch -p0 < musl-ipv6.patch
+
 ./configure \
     --prefix=/usr \
     --disable-static

core/libnl3/checksums

@@ -1 +1,2 @@
 b7287637ae71c6db6f89e1422c995f0407ff2fe50cecd61a312b6a9b0921f5bf  libnl-3.4.0.tar.gz
+1612b99cb124af51bd4d38be377e352f94d7730c32aabf519f0355f04d08b1c0  musl-ipv6.patch

core/libnl3/manifest

@@ -1,5 +1,7 @@
 /var/db/kiss/libnl3/version
 /var/db/kiss/libnl3/sources
+/var/db/kiss/libnl3/patches/musl-ipv6.patch
+/var/db/kiss/libnl3/patches/
 /var/db/kiss/libnl3/manifest
 /var/db/kiss/libnl3/licenses
 /var/db/kiss/libnl3/checksums

core/libnl3/patches/musl-ipv6.patch

@@ -0,0 +1,12 @@
+--- include/linux-private/linux/ipv6.h	2016-12-10 08:04:32.000000000 -0700
++++ include/linux-private/linux/ipv6.h	2017-07-03 06:45:50.412094448 -0600
+@@ -2,7 +2,9 @@
+ #define _IPV6_H
+ 
+ #include <asm/byteorder.h>
++#if defined(__GLIBC__)
+ #include <linux/in6.h>
++#endif
+ 
+ /* The latest drafts declared increase in minimal mtu up to 1280. */
+ 

core/libnl3/sources

@@ -1 +1,2 @@
 https://github.com/thom311/libnl/releases/download/libnl3_4_0/libnl-3.4.0.tar.gz
+patches/musl-ipv6.patch