[Buildroot] [PATCH] glibc: install the obsolete libnsl

[Baruch Siach]

glibc 2.27 stopped installing libnsl by default. Restore libnsl install
to fix packages, like exim, that use that library.

Fixes (exim):
http://autobuild.buildroot.net/results/a19/a19df43be7d27cf8815e1257122d25aa8285d75b/
http://autobuild.buildroot.net/results/8ec/8ecfc42a81efec8485784f945e231eb40a087b5b/
http://autobuild.buildroot.net/results/054/054eb702a9b8c66454970333ef45a0afccb7cc80/

Cc: Waldemar Brodkorb <wbx at openadk.org>
Signed-off-by: Baruch Siach <baruch at tkos.co.il>
---
 package/glibc/glibc.mk | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package/glibc/glibc.mk b/package/glibc/glibc.mk
index 00e114566cbe..f724ced857fe 100644
--- a/package/glibc/glibc.mk
+++ b/package/glibc/glibc.mk
@@ -100,6 +100,7 @@ define GLIBC_CONFIGURE_CMDS
 		--disable-profile \
 		--without-gd \
 		--enable-obsolete-rpc \
+		--enable-obsolete-nsl \
 		--enable-kernel=$(call qstrip,$(BR2_TOOLCHAIN_HEADERS_AT_LEAST)) \
 		--with-headers=$(STAGING_DIR)/usr/include)
 	$(GLIBC_ADD_MISSING_STUB_H)
-- 
2.16.1