make release that builds

[ilf]

The most current release (3.6) doesn't build on current systems with current libgcrypt:

/usr/bin/ld: lib/lib.o: in function `ssl_des3_encrypt':
(.text+0xaf03): undefined reference to `gcry_cipher_open'
/usr/bin/ld: (.text+0xaf11): undefined reference to `gcry_cipher_close'
/usr/bin/ld: (.text+0xaf48): undefined reference to `gcry_cipher_setkey'
/usr/bin/ld: (.text+0xaf5e): undefined reference to `gcry_cipher_setiv'
/usr/bin/ld: (.text+0xaf7a): undefined reference to `gcry_cipher_encrypt'
/usr/bin/ld: (.text+0xaf88): undefined reference to `gcry_cipher_close'
collect2: error: ld returned 1 exit status
make: *** [Makefile:167: bitlbee] Error 1
==> ERROR: A failure occurred in build().
    Aborting...

This was patched in July: ​https://github.com/bitlbee/bitlbee/commit/684aca266fad3fe7793fe637a71b095500c35998

But there's no release with this yet. Would be great to have one. Thanks!