common/hooks: fix python shebang rewrite for multi-versioned packages

common/hooks/pre-pkg/03-rewrite-python-shebang.sh

@@ -4,6 +4,12 @@
 hook() {
 	local pyver= shebang= warn=
 
+	case $pkgname in
+	python-*)
+		pyver=2.7;;
+	python3.4-*)
+		pyver=3.4;;
+	*)
 		for i in $python_versions; do
 			if [ "$pyver" ]; then
 				warn=1
@@ -11,8 +17,10 @@ hook() {
 			fi
 			pyver=$i
 		done
-
 		: ${pyver:=2.7}
+		;;
+	esac
+
 	shebang="#!/usr/bin/python$pyver"
 	find ${PKGDESTDIR} -type f -print0 | \
 		xargs -0 grep -H -b -m 1 "^#!.*\([[:space:]]\|/\)python\([[:space:]]\|$\)" -- | while IFS=: read -r f off _; do