volume_key: volume_key-python -> volume_key-python3

No comment.

srcpkgs/volume_key/template

@@ -1,9 +1,9 @@
 # Template file for 'volume_key'
 pkgname=volume_key
 version=0.3.11
-revision=1
+revision=2
 build_style=gnu-configure
-make_build_args="PYTHON3_CFLAGS=-I${XBPS_CROSS_BASE}/usr/include/python3.6m"
+make_build_args="PYTHON3_CFLAGS=-I${XBPS_CROSS_BASE}/${py3_inc}"
 hostmakedepends="pkg-config python3"
 makedepends="cryptsetup-devel glib-devel gpgme-devel nss-devel python3-devel"
 short_desc="Library for manipulating storage volume encryption keys"
@@ -13,7 +13,7 @@ homepage="https://pagure.io/volume_key"
 distfiles="https://releases.pagure.org/volume_key/volume_key-${version}.tar.xz"
 checksum=e6b279c25ae477b555f938db2e41818f90c8cde942b0eec92f70b6c772095f6d
 
-volume_key-python_package() {
+volume_key-python3_package() {
 	lib32disabled=yes
 	pycompile_module="volume_key.py"
 	short_desc+=" - Python3 bindings"