downloads: upgrade libressl to 3.0.2

Latest version.

Author: indygreg

pythonbuild/downloads.py

@@ -168,10 +168,10 @@
         "version": "0.1",
     },
     "libressl": {
-        "url": "https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.9.2.tar.gz",
-        "size": 3607549,
-        "sha256": "c4c78167fae325b47aebd8beb54b6041d6f6a56b3743f4bd5d79b15642f9d5d4",
-        "version": "2.9.2",
+        "url": "https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.0.2.tar.gz",
+        "size": 3669468,
+        "sha256": "df7b172bf79b957dd27ef36dcaa1fb162562c0e8999e194aa8c1a3df2f15398e",
+        "version": "3.0.2",
         "library_names": ["crypto", "ssl"],
         "licenses": ["OpenSSL"],
         "license_file": "LICENSE.libressl.txt",