libnss-mdns: Stop trying to build for musl

There's no point in building an NSS module for a C library
that doesn't support NSS.

(From OE-Core rev: e3197eeaf352cb5c578a675ce2a07881fad597e6)

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/libnss-mdns/libnss-mdns/0001-check-for-nss.h.patch

@@ -1,56 +0,0 @@
-From bdf01a581d58eb5340e9238d143dbcac9db5b11c Mon Sep 17 00:00:00 2001
-From: Khem Raj <raj.khem@gmail.com>
-Date: Sat, 30 Jan 2016 19:29:45 +0000
-Subject: [PATCH] check for nss.h
-
-nss.h may not available on all libc implementations, e.g. musl does not
-have this header, this patch detects nss.h presence and defines the data
-types that are required if nss.h is missing on platform
-
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
----
-Upstream-Status: Pending
-
- configure.ac |  2 +-
- src/nss.c    | 11 +++++++++++
- 2 files changed, 12 insertions(+), 1 deletion(-)
-
-diff --git a/configure.ac b/configure.ac
-index aa66bc6..ce19b07 100644
---- a/configure.ac
-+++ b/configure.ac
-@@ -71,7 +71,7 @@ AC_PROG_LIBTOOL
- 
- # Checks for header files.
- AC_HEADER_STDC
--AC_CHECK_HEADERS([arpa/inet.h fcntl.h inttypes.h netdb.h netinet/in.h stdlib.h string.h sys/socket.h sys/time.h unistd.h nss.h sys/ioctl.h])
-+AC_CHECK_HEADERS([arpa/inet.h fcntl.h inttypes.h netdb.h netinet/in.h stdlib.h string.h sys/socket.h sys/time.h unistd.h nss.h sys/ioctl.h nss.h])
- 
- # Checks for typedefs, structures, and compiler characteristics.
- AC_C_CONST
-diff --git a/src/nss.c b/src/nss.c
-index e48e315..406733b 100644
---- a/src/nss.c
-+++ b/src/nss.c
-@@ -29,7 +29,18 @@
- #include <assert.h>
- #include <netdb.h>
- #include <sys/socket.h>
-+#ifdef HAVE_NSS_H
- #include <nss.h>
-+#else
-+enum nss_status {
-+    NSS_STATUS_TRYAGAIN = -2,
-+    NSS_STATUS_UNAVAIL,
-+    NSS_STATUS_NOTFOUND,
-+    NSS_STATUS_SUCCESS,
-+    NSS_STATUS_RETURN
-+};
-+#endif
-+
- #include <stdio.h>
- #include <stdlib.h>
- 
--- 
-2.7.0
-

meta/recipes-connectivity/libnss-mdns/libnss-mdns_0.10.bb

@@ -9,7 +9,6 @@ DEPENDS = "avahi"
 PR = "r7"
 
 SRC_URI = "http://0pointer.de/lennart/projects/nss-mdns/nss-mdns-${PV}.tar.gz \
-           file://0001-check-for-nss.h.patch \
            "
 
 SRC_URI[md5sum] = "03938f17646efbb50aa70ba5f99f51d7"
@@ -21,6 +20,8 @@ localstatedir = "/"
 
 inherit autotools
 
+COMPATIBLE_HOST_libc-musl = 'null'
+
 EXTRA_OECONF = "--libdir=${base_libdir} --disable-lynx --enable-avahi"
 
 # suppress warning, but don't bother with autonamer