clang-parser: Extend support for char type
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 <ae8113f64d9c72812e097938d25a8975da69c074@linux.ibm.com>

iovisor/bpftrace,iovisor/bpftrace,iovisor/bpftrace,iovisor/bpftrace