Implement attach by name in LLDB Vim plugin using ":Lattach <process-name>"

patch by Arthur Evstifeev



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@182483 91177308-0d34-0410-b5e6-96231b3b80d8
LLDB Vim plugin usability improvement: ":Lshow" now displays all panes
- no longer requires a pane name argument

Patch by Arthur Evstifeev



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@182484 91177308-0d34-0410-b5e6-96231b3b80d8