[pdbdump] Print out # of hash buckets.

In the reference code, the field name is `cHashBuckets`.

llvm-svn: 272075
diff --git a/llvm/lib/DebugInfo/PDB/Raw/TpiStream.cpp b/llvm/lib/DebugInfo/PDB/Raw/TpiStream.cpp
index 2002456..386f8ac 100644
--- a/llvm/lib/DebugInfo/PDB/Raw/TpiStream.cpp
+++ b/llvm/lib/DebugInfo/PDB/Raw/TpiStream.cpp
@@ -153,6 +153,7 @@
   return Header->HashAuxStreamIndex;
 }
 
+uint32_t TpiStream::NumHashBuckets() const { return Header->NumHashBuckets; }
 uint32_t TpiStream::getHashKeySize() const { return Header->HashKeySize; }
 
 codeview::FixedStreamArray<support::ulittle32_t>