GDB 12 has changed gdb.Value interface

This causes issues for

Line 521 in 60da4b4

gdb.Value.__init__(value)

See commit bminor/binutils-gdb@2988a36

This causes issues for

Boost-Pretty-Printer/boost/utils.py

Line 521 in 60da4b4

gdb.Value.__init__(value)

I was getting the following error related to this issue

Python Exception <class 'TypeError'>: function missing required argument 'val' (pos 1)

I found a workaround, and it's simply change that line for

        gdb.Value.__init__(self, val=value)

as it seems coherent with the valpy_init function.