Add declarations for Android compatibility funcs.

Some parts of Android can't be updated yet so this change adds
declarations (only) for some functions that will be stubbed in
Android-specific code. (That Android-specific code will live in the
Android repo, not the BoringSSL repo.)

Trying to use these functions outside of Android will result in a link
error.

Change-Id: Iaa9b956e6408d21cd8fc34d90d9c15657e429877
Reviewed-on: https://boringssl-review.googlesource.com/2760
Reviewed-by: David Benjamin <davidben@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>

include/openssl/bn.h

diff --git a/include/openssl/bn.h b/include/openssl/bn.h
index 37a4bba..0631b8c 100644
--- a/include/openssl/bn.h
+++ b/include/openssl/bn.h
@@ -802,6 +802,15 @@
 #define BN_FLG_CONSTTIME 0x04
 
 
+/* Android compatibility section.
+ *
+ * These functions are declared, temporarily, for Android because
+ * wpa_supplicant will take a little time to sync with upstream. Outside of
+ * Android they'll have no definition. */
+
+OPENSSL_EXPORT BIGNUM *get_rfc3526_prime_1536(BIGNUM *bn);
+
+
 #if defined(__cplusplus)
 }  /* extern C */
 #endif

include/openssl/cipher.h

diff --git a/include/openssl/cipher.h b/include/openssl/cipher.h
index d78debf..b496c85 100644
--- a/include/openssl/cipher.h
+++ b/include/openssl/cipher.h
@@ -485,6 +485,16 @@
 } EVP_CIPHER_INFO;
 
 
+/* Android compatibility section.
+ *
+ * These functions are declared, temporarily, for Android because
+ * wpa_supplicant will take a little time to sync with upstream. Outside of
+ * Android they'll have no definition. */
+
+OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_192_ecb(void);
+OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_192_cbc(void);
+
+
 #if defined(__cplusplus)
 }  /* extern C */
 #endif

include/openssl/err.h

diff --git a/include/openssl/err.h b/include/openssl/err.h
index ca1f6c4..071c5ba 100644
--- a/include/openssl/err.h
+++ b/include/openssl/err.h
@@ -525,6 +525,15 @@
 OPENSSL_EXPORT void ERR_load_BIO_strings(void);
 
 
+/* Android compatibility section.
+ *
+ * These functions are declared, temporarily, for Android because
+ * wpa_supplicant will take a little time to sync with upstream. Outside of
+ * Android they'll have no definition. */
+
+OPENSSL_EXPORT void ERR_remove_state(unsigned long pid);
+
+
 #if defined(__cplusplus)
 } /* extern C */
 #endif

include/openssl/ssl.h

diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index f6ad654..960bc86 100644
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -2218,6 +2218,19 @@
 OPENSSL_EXPORT void ERR_load_SSL_strings(void);
 
 
+/* Android compatibility section.
+ *
+ * These functions are declared, temporarily, for Android because
+ * wpa_supplicant will take a little time to sync with upstream. Outside of
+ * Android they'll have no definition. */
+
+#define SSL_F_SSL_SET_SESSION_TICKET_EXT doesnt_exist
+
+OPENSSL_EXPORT int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len);
+OPENSSL_EXPORT int SSL_set_session_secret_cb(SSL *s, void *cb, void *arg);
+OPENSSL_EXPORT int SSL_set_session_ticket_ext_cb(SSL *s, void *cb, void *arg);
+
+
 #ifdef  __cplusplus
 }
 #endif