manifest: add prebuilts openssl

Change-Id: I9f98418b9c2249680d0b1699c8fcb2045381789a

omni-default.xml

@@ -26,6 +26,7 @@
   <project path="external/vim" name="android_external_vim" remote="omnirom" revision="android-10" />
   <project path="external/zip" name="android_external_zip"  remote="omnirom" revision="android-10" />
 
+  <project path="prebuilts/openssl" name="android_prebuilts_openssl" remote="omnirom" revision="android-10" />
   <project path="packages/apps/Matlog" name="android_packages_apps_Matlog" remote="omnirom" revision="android-10" />
   <!--<project path="packages/apps/MonthCalendarWidget" name="android_packages_apps_MonthCalendarWidget" remote="omnirom" revision="android-9.0" />-->
   <project path="packages/apps/OmniChange" name="android_packages_apps_OmniChange" remote="omnirom" revision="android-10" />