[RemoteMirrors] Clear the Demangler on each iteration of the loop in getFieldTypeInfo. Otherwise the Demangler can end up allocating hundreds of megabytes of memory.
[RemoteMirrors] Clear the Demangler on each iteration of the loop in getFieldTypeInfo. Otherwise the Demangler can end up allocating hundreds of megabytes of memory.

rdar://problem/40826018
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