[source] nettle: enable fat build

[LEDE Commits]

jow pushed a commit to source.git, branch master:
https://git.lede-project.org/00e0a7d6009b615c395ee103085f4a6fec106f8e

commit 00e0a7d6009b615c395ee103085f4a6fec106f8e
Author: Nikos Mavrogiannopoulos <nmav at gnutls.org>
AuthorDate: Sat Nov 5 12:35:54 2016 +0100

    nettle: enable fat build
    
    This allows to include optimizations such as ARM neon which
    are detected on run-time.
    
    Signed-off-by: Nikos Mavrogiannopoulos <nmav at gnutls.org>
    [Jo-Philipp Wich: picked from openwrt#191 and rebased onto LEDE master]
    Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 package/libs/nettle/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package/libs/nettle/Makefile b/package/libs/nettle/Makefile
index 3d8beed..5a8c3b1 100644
--- a/package/libs/nettle/Makefile
+++ b/package/libs/nettle/Makefile
@@ -40,6 +40,7 @@ TARGET_CFLAGS += $(FPIC)
 
 CONFIGURE_ARGS += \
 	--enable-shared \
+	--enable-fat \
 	--disable-openssl \
 	--disable-documentation \
 	--enable-static