clang-parser: Extend support for char type

This extends support for the char type by making the clang
parser recognize CXType_Char_U as well.

Currently, the clang parser assumes that the char type is
always implemented as a signed char. However, for certain
architectures like powerpc64, the char type is unsigned
and the parser fails to recognize such variables.
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>

src/clang_parser.cpp

@@ -47,6 +47,7 @@ static SizedType get_sized_type(CXType clang_type)
   switch (clang_type.kind)
   {
     case CXType_Char_S:
+    case CXType_Char_U:
     case CXType_SChar:
     case CXType_UChar:
     case CXType_Short:
@@ -83,7 +84,7 @@ static SizedType get_sized_type(CXType clang_type)
     {
       auto elem_type = clang_getArrayElementType(clang_type);
       auto size = clang_getArraySize(clang_type);
-      if (elem_type.kind == CXType_Char_S)
+      if (elem_type.kind == CXType_Char_S || elem_type.kind == CXType_Char_U)
       {
         return SizedType(Type::string, size);
       }