dos2unix: fix build mechanism and pie

srcpkgs/dos2unix/template

@@ -1,7 +1,8 @@
 # Template file for 'dos2unix'
 pkgname=dos2unix
 version=7.3.3
-revision=1
+revision=2
+build_style=gnu-makefile
 maintainer="Dominik Honnef <dominik@honnef.co>"
 license="2-clause-BSD"
 homepage="http://waterlan.home.xs4all.nl/dos2unix.html"
@@ -9,12 +10,7 @@ short_desc="Text file format converter"
 distfiles="http://waterlan.home.xs4all.nl/${pkgname}/${pkgname}-${version}.tar.gz"
 checksum=5c910aea2eae96663c67e87627998c4fe3cded403be5819b4c190e56c82ff0fb
 
-do_build() {
-	make prefix=${DESTDIR}/usr
-}
-
-do_install() {
-	make prefix=${DESTDIR}/usr install
+post_install() {
 	rm -rf ${DESTDIR}/usr/share/doc/${pkgname}-${version}
 
 	vlicense COPYING.txt