Merge branch 'jk/slimmed-down'

Trim an unused binary and turn a bunch of commands into built-in.

* jk/slimmed-down:
  drop vcs-svn experiment
  make git-fast-import a builtin
  make git-bugreport a builtin
  make credential helpers builtins
  Makefile: drop builtins from MSVC pdb list

diff --cc builtin/bugreport.c
Simple merge

diff --cc builtin/fast-import.c
Simple merge

diff --cc t/test-lib-functions.sh
Simple merge