Initialise OPENSSL_armcap_P to 0 before setting it based on capabilities, not after
Initialise OPENSSL_armcap_P to 0 before setting it based on capabilities, not after

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>

Reviewed-by: Tomas Mraz <2bc6038c3dfca09b2da23c8b6da8ba884dc2dcc2@openssl.org>
Reviewed-by: Shane Lontis <452ce16516ceed26291fe7de3f8b53540d83864e@oracle.com>
Reviewed-by: Paul Dale <ddec78389666b4f7c9b4d110380c848489a3e4aa@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15486)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl