Add a no-op |OPENSSL_no_config|.

Nodejs 6.9.0 calls this function.

Change-Id: I375f222cb819ebcb9fdce0a0d63df6817fa2dcae
Reviewed-on: https://boringssl-review.googlesource.com/11625
Commit-Queue: Adam Langley <alangley@gmail.com>
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

crypto/conf/conf.c

@@ -786,3 +786,5 @@ int CONF_modules_load_file(CONF_MUST_BE_NULL *filename, const char *appname,
 void CONF_modules_free(void) {}
 
 void OPENSSL_config(CONF_MUST_BE_NULL *config_name) {}
+
+void OPENSSL_no_config(void) {}

include/openssl/conf.h

@@ -155,6 +155,9 @@ OPENSSL_EXPORT void CONF_modules_free(void);
 /* OPENSSL_config does nothing. */
 OPENSSL_EXPORT void OPENSSL_config(CONF_MUST_BE_NULL *config_name);
 
+/* OPENSSL_no_config does nothing. */
+OPENSSL_EXPORT void OPENSSL_no_config(void);
+
 
 #if defined(__cplusplus)
 }  /* extern C */