Update _g() to g_() in pkgkde-symbolshelper
According to the embedded changelog in Dpkg::Gettext (at /usr/share/perl5/Dpkg/Gettext.pm):
=head2 Version 2.00 (dpkg 1.20.0)
Remove function: _g().
=head2 Version 1.03 (dpkg 1.19.0)
New envvar: Add support for new B<DPKG_NLS> environment variable.
=head2 Version 1.02 (dpkg 1.18.3)
New function: N_().
=head2 Version 1.01 (dpkg 1.18.0)
Now the short aliases (g_ and P_) will call domain aware functions with
$DEFAULT_TEXT_DOMAIN.
New functions: g_(), C_().
Deprecated function: _g().
_g no longer exists, and it appears to be replaced with g_.
I ran into this because pkgkde-symbolshelper was bailing out while trying to patch symbols in Ubuntu. Swapping out _g for g_ fixed the issue and let me finish my work.