endbr32/endbr64 instructions for x32/x64

[noword]

with cstool:

$ cstool  x32 f30f1efb
0  f3 0f 1e fb                                      endbr32

$ cstool  x64 f30f1efa
0  f3 0f 1e fa                                      endbr64

with kstool:

$ kstool x32 endbr32
ERROR: failed on ks_asm() with count = zu, error = '(null)' (code = 2252014000)

$ kstool x64 endbr64
ERROR: failed on ks_asm() with count = zu, error = '(null)' (code = 2252014000)