[lldb/Docs] Add the application speicfic lldbinit to the man page
This used to be part of the man page but got lost when we moved to
generating it with Sphinx.
(cherry picked from commit 40c4ecabc238cfdd639bc1e927800337457e69e3)
JDevlieghere on May 26 2020, 5:22 PM.Authored by