libclang: New functions clang_Type_getNumTemplateArguments,
clang_Type_getTemplateArgument

Note that these functions don't handle variadic templates -- see tests.

Patch by Matthieu Nottale and Philippe Daouadi.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@202406 91177308-0d34-0410-b5e6-96231b3b80d8