package/ltrace: bump ltrace using a more recent git repo

The official repo pointed by https://ltrace.org/ hasn't seen any
updates in 5 years, so this commit switches to
https://github.com/dkogan/ltrace

 from Dima Kogan that includes some
bug fixes, in particular the following commit to avoid a crash:

  192e0a6 void struct members are now ignored

The previous ltrace version gave a crash on a ARMv7 device, showing
this error:

  "Assertion `field_info->type != ARGTYPE_VOID' failed."

Using this commit ltrace shows a '<void>' return value in such cases,
but at least avoids the crash.

Signed-off-by: Mauro Meneghin <mauro.meneghin@youview.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>