native_log2: Switch to generic native intrinsic inc file

v2: Add __CLC_XCONCAT instead of function name redirection
    Use __CLC_XCONCAT for intrinsic functions as well

Reviewer: Jeroen Ketema
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 317932
GitOrigin-RevId: f58dee9f3a5773dfebcd60df60781c12def0f718
3 files changed