openssl: security bump to version 1.0.2a

Fixes:
CVE-2015-0291 - ClientHello sigalgs DoS
CVE-2015-0290 - Multiblock corrupted pointer
CVE-2015-0207 - Segmentation fault in DTLSv1_listen
CVE-2015-0286 - Segmentation fault in ASN1_TYPE_cmp
CVE-2015-0208 - Segmentation fault for invalid PSS parameters
CVE-2015-0287 - ASN.1 structure reuse memory corruption
CVE-2015-0289 - PKCS7 NULL pointer dereferences
CVE-2015-0293 - DoS via reachable assert in SSLv2 servers
CVE-2015-1787 - Empty CKE with client auth and DHE
CVE-2015-0285 - Handshake with unseeded PRNG
CVE-2015-0209 - Use After Free following d2i_ECPrivatekey error
CVE-2015-0288 - X509_to_X509_REQ NULL pointer deref

musl patch removed since it's no longer necessary.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>