Moved inherit above EXPORT_FUNCTIONS

Portage 3.0.23 complains:

* For compatibility with PMS and to avoid breakage with Pkgcore, only call
* EXPORT_FUNCTIONS after inherit(s). Portage behavior may change in future.

This commit fixes

Closes #1

git-verify-signature.eclass

@@ -54,9 +54,10 @@ case "${EAPI:-0}" in
 		;;
 esac
 
+inherit git-r3 verify-sig
+
 EXPORT_FUNCTIONS src_unpack
 
-inherit git-r3 verify-sig
 
 # Variables from verify-sig.eclass
 # @ECLASS-VARIABLE: VERIFY_SIG_OPENPGP_KEY_PATH