swh-lv2: switch to gnu-makefile build_style, needs pkg-config.

srcpkgs/swh-lv2/swh-lv2.rshlibs

@@ -1,3 +1,3 @@
 libc.so.6
 libfftw3f.so.3
-libm.so.6
+libm.so.6 i686

srcpkgs/swh-lv2/template

@@ -1,9 +1,11 @@
 # Template file for 'swh-lv2'
 pkgname=swh-lv2
 version=1.0.15
+revision=2
+build_style=gnu-makefile
+make_install_target="install-system"
 homepage="http://plugin.org.uk/"
 distfiles="http://plugin.org.uk/lv2/${pkgname}-${version}.tar.gz"
-revision=2
 short_desc="Collection of GPL (free software) LV2 audio plugins"
 maintainer="davehome <davehome@redthumb.info.tm>"
 license="GPL-3"
@@ -11,20 +13,10 @@ checksum=5809441a94571d2f492a5e015ad035ea747127e0322e531b79a960fd0c3d250d
 long_desc="
  Collection of GPL (free software) LV2 audio plugins"
 
+Add_dependency build pkg-config
 Add_dependency build fftw-devel
 Add_dependency build libxslt
 
-do_configure()
-{
+pre_build() {
 	sed -i -e "s|/usr/local|$DESTDIR/usr|" Makefile
 }
-
-do_build()
-{
-	make ${makejobs}
-}
-
-do_install()
-{
-	make ${makejobs} install-system
-}