Use OPENSSL_strcasecmp.

Windows doesn't provide strcasecmp and I forgot to use the wrapper
function in 704453fa9c2b62cafe2e5455bf2f0147d5f7230b.

Change-Id: I291387d1f73328977fc9e0ba7c3b23eede9bc368

crypto/cipher/cipher.c

diff --git a/crypto/cipher/cipher.c b/crypto/cipher/cipher.c
index fd613a6..db1da19 100644
--- a/crypto/cipher/cipher.c
+++ b/crypto/cipher/cipher.c
@@ -630,24 +630,24 @@
 }
 
 const EVP_CIPHER *EVP_get_cipherbyname(const char *name) {
-  if (strcasecmp(name, "rc4") == 0) {
+  if (OPENSSL_strcasecmp(name, "rc4") == 0) {
     return EVP_rc4();
-  } else if (strcasecmp(name, "des-cbc") == 0) {
+  } else if (OPENSSL_strcasecmp(name, "des-cbc") == 0) {
     return EVP_des_cbc();
-  } else if (strcasecmp(name, "3des-cbc") == 0 ||
-             strcasecmp(name, "3des") == 0) {
+  } else if (OPENSSL_strcasecmp(name, "3des-cbc") == 0 ||
+             OPENSSL_strcasecmp(name, "3des") == 0) {
     return EVP_des_ede3_cbc();
-  } else if (strcasecmp(name, "aes-128-cbc") == 0) {
+  } else if (OPENSSL_strcasecmp(name, "aes-128-cbc") == 0) {
     return EVP_aes_128_cbc();
-  } else if (strcasecmp(name, "aes-256-cbc") == 0) {
+  } else if (OPENSSL_strcasecmp(name, "aes-256-cbc") == 0) {
     return EVP_aes_256_cbc();
-  } else if (strcasecmp(name, "aes-128-ctr") == 0) {
+  } else if (OPENSSL_strcasecmp(name, "aes-128-ctr") == 0) {
     return EVP_aes_128_ctr();
-  } else if (strcasecmp(name, "aes-256-ctr") == 0) {
+  } else if (OPENSSL_strcasecmp(name, "aes-256-ctr") == 0) {
     return EVP_aes_256_ctr();
-  } else if (strcasecmp(name, "aes-128-ecb") == 0) {
+  } else if (OPENSSL_strcasecmp(name, "aes-128-ecb") == 0) {
     return EVP_aes_128_ecb();
-  } else if (strcasecmp(name, "aes-256-ecb") == 0) {
+  } else if (OPENSSL_strcasecmp(name, "aes-256-ecb") == 0) {
     return EVP_aes_256_ecb();
   }