sci-misc/boinc: update icon cache in 7.8.4 as well

This brings in the iconcache update fix from 7.8.1-r1 that was
pushed while 7.8.4 PR was still unmerged. But without the
redundant gnome2_icon_savelist call, as the conditional to
only call cache update isn't inside itself since a while now.

Bug: https://bugs.gentoo.org/636886
Package-Manager: Portage-2.3.19, Repoman-2.3.6

sci-misc/boinc/boinc-7.8.4.ebuild

@@ -5,7 +5,7 @@ EAPI=6
 
 WX_GTK_VER=3.0-gtk3
 
-inherit autotools eutils linux-info systemd user versionator wxwidgets
+inherit autotools eutils gnome2-utils linux-info systemd user versionator wxwidgets
 
 MY_PV=$(get_version_component_range 1-2)
 
@@ -67,7 +67,7 @@ pkg_setup() {
 			ewarn "Can't check the linux kernel configuration."
 			ewarn "You might be missing vsyscall support."
 		elif kernel_is -ge 4 4 \
-		    && linux_chkconfig_present LEGACY_VSYSCALL_NONE; then
+			&& linux_chkconfig_present LEGACY_VSYSCALL_NONE; then
 			ewarn "You do not have vsyscall emulation enabled."
 			ewarn "This will prevent some boinc projects from running."
 			ewarn "Please enable vsyscall emulation:"
@@ -145,6 +145,8 @@ pkg_preinst() {
 }
 
 pkg_postinst() {
+	gnome2_icon_cache_update
+
 	elog
 	elog "You are using the source compiled version of boinc."
 	use X && elog "The graphical manager can be found at /usr/bin/boincmgr"
@@ -179,3 +181,7 @@ pkg_postinst() {
 	fi
 	elog
 }
+
+pkg_postrm() {
+	gnome2_icon_cache_update
+}