[llvm-pdbutil] Rename "raw" to "dump".

Now you run llvm-pdbutil dump <options>.  This is a followup
after having renamed the tool, whereas before raw was obviously
just the style of dumping, whereas now "dump" is the action to
perform with the "util".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@306055 91177308-0d34-0410-b5e6-96231b3b80d8
11 files changed