gsturidecodebin: remove generic 'source' element name

Submitted by Marc Leeman @den_erpel

Link to original bug (#779847)

Description

Created attachment 347623
remove generic 'source' element name

This obfuscates real names of underlying source elements,
thereby making debugging more inconvenient since all
source elements would be dubbed 'source' instead of e.g.
'rtspsrc%d', 'udpsrc%d' etc.

Patch 347623, "remove generic 'source' element name":
0010-gsturidecodebin-remove-generic-source-element-name.patch

Version: 1.10.4