bump build.

oof: I previously pushed a build number 2.6.4.x to the 2.6.3.x release, so
now we have to stick with 2.6.4 in order to upload it. =/

// FREEBIE

Signal/Signal-Info.plist

@@ -38,7 +38,7 @@
 		</dict>
 	</array>
 	<key>CFBundleVersion</key>
-	<string>2.6.3.13</string>
+	<string>2.6.4.oops.i.mean.3.14</string>
 	<key>ITSAppUsesNonExemptEncryption</key>
 	<false/>
 	<key>LOGS_EMAIL</key>