wiki: add page explaining build verification

Change-Id: I1043a206e7be2546effe54d673a323c11a355e99

Author: zifnab06

pages/meta/verifying_builds.md

@@ -0,0 +1,23 @@
+---
+sidebar: home_sidebar
+title: Verifying Build Authenticity
+folder: meta
+permalink: verifying-builds.html
+---
+
+All official builds from LineageOS are signed with our private keys. You can verify a build has been signed with our keys by running: 
+
+```
+keytool -list -printcert -jarfile lineage-build-signed.zip
+```
+
+The resulting fingerprints are listed as follows: 
+
+```
+Certificate fingerprints:
+         MD5:  F2:CA:AA:A7:2F:D6:34:FE:70:D7:5C:41:43:6C:5E:14
+         SHA1: 9B:6D:F9:06:2A:1A:76:E6:E0:07:B1:1F:C2:EF:CB:EF:4B:32:F2:23
+         SHA256: 51:83:25:EF:7F:96:C0:D1:19:4C:2E:85:6B:04:0D:63:61:66:FF:B8:46:71:7D:72:FA:87:F4:FA:E5:BE:7B:BB
+```
+
+For the paranoid, the contents of this page are stored on github [here](https://github.com/lineageos/lineage_wiki/blob/master/pages/meta/verifying_builds.md).