Revert "Add g_set_prgname() to frida_init() (#235)"

[bet4it]

This reverts commit 98e531b97ea5e8305ca3391fdcd29990e87d8cd4.

Before:

$ frida-server -h
Usage:
  frida [OPTION?]
...

$ frida-inject -h
Usage:
  frida [OPTION?]
...

After:

$ frida-server -h
Usage:
  frida-server [OPTION?]
...

$ frida-inject -h
Usage:
  frida-inject [OPTION?]
...

The bug described in https://github.com/frida/frida-core/issues/235#issuecomment-1845825617 was solved in https://github.com/frida/glib/commit/bf2a10211b3d3896943bac2010197b0728a32fac.

[oleavr]

Thanks!