openssl: add elliptic curve crypto compilation options to openssl

This patch adds EC compilation options to openssl
OPENSSL_WITH_EC is needed for authsae (OPENSSL_WITH_EC2M isn't)
Activating ec (but not ec2m) in openssl take 35Ko more on ar71xx (ipk size)
Activating both take 52Ko.

Signed-off-by: Etienne CHAMPETIER <etienne.champetier@free.fr>

git-svn-id: svn://svn.openwrt.org/openwrt@37523 3c298f89-4303-0410-b956-a3cf2f4a3e73
openssl: enable elliptic curve crypto by default (so that it can be used by things like ipsec as well)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@37524 3c298f89-4303-0410-b956-a3cf2f4a3e73
uClibc: build with debug symbols by default (without changing other compile related flags)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@37525 3c298f89-4303-0410-b956-a3cf2f4a3e73