Fix build compilation failures

BIO_f_linebuffer() is now built by default instead of just on VMS, but
the prototype in the header was still only available on VMS.
Reviewed-by: NRich Salz <rsalz@openssl.org>

include/openssl/bio.h

@@ -631,9 +631,7 @@ const BIO_METHOD *BIO_s_bio(void);
 const BIO_METHOD *BIO_s_null(void);
 const BIO_METHOD *BIO_f_null(void);
 const BIO_METHOD *BIO_f_buffer(void);
-# ifdef OPENSSL_SYS_VMS
 const BIO_METHOD *BIO_f_linebuffer(void);
-# endif
 const BIO_METHOD *BIO_f_nbio_test(void);
 # ifndef OPENSSL_NO_DGRAM
 const BIO_METHOD *BIO_s_datagram(void);

util/libcrypto.num

@@ -1385,7 +1385,7 @@ BN_free                                 1342	1_1_0	EXIST::FUNCTION:
 EVP_aes_128_cfb1                        1343	1_1_0	EXIST::FUNCTION:AES
 EC_KEY_get0_group                       1344	1_1_0	EXIST::FUNCTION:EC
 PEM_write_bio_CMS_stream                1345	1_1_0	EXIST::FUNCTION:CMS
-BIO_f_linebuffer                        1346	1_1_0	EXIST:VMS:FUNCTION:
+BIO_f_linebuffer                        1346	1_1_0	EXIST::FUNCTION:
 ASN1_item_d2i_bio                       1347	1_1_0	EXIST::FUNCTION:
 ENGINE_get_flags                        1348	1_1_0	EXIST::FUNCTION:ENGINE
 OCSP_resp_find                          1349	1_1_0	EXIST::FUNCTION: