pidgin/pidgin

Replace gethostname by g_get_host_name

2021-03-04, Elliott Sales de Andrade
691bd780ab06
Replace gethostname by g_get_host_name

Replace `gethostname` by `g_get_host_name`.

Testing Done:
Compile only.

Reviewed at https://reviews.imfreedom.org/r/555/
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