main/lz4: upgrade to 1.7.5

* Modernize abuild
* Add $pkgname-libs to split "bin" and "libs"
* Switch to new github page

main/lz4/APKBUILD

 # Contributor: Stuart Cardall <developer@it-offshore.co.uk>
 # Maintainer: Stuart Cardall <developer@it-offshore.co.uk>
 pkgname=lz4
-pkgver=131
-_pkgver=r${pkgver}
+pkgver=1.7.5
 pkgrel=0
 pkgdesc="LZ4 is lossless compression algorithm with fast decoder @ multiple GB/s per core."
-url="http://www.lz4.info"
+url="https://github.com/lz4/lz4"
 arch="all"
-license="BSD / GPLv2"
-depends_dev=""
-makedepends="$depends_dev"
-subpackages="$pkgname-dev $pkgname-doc"
-source="$pkgname-$_pkgver.tar.gz::https://github.com/Cyan4973/lz4/archive/$_pkgver.tar.gz"
-
-_builddir="$srcdir"/$pkgname-$_pkgver
-prepare() {
-	local i
-	cd "$_builddir"
-	for i in $source; do
-		case $i in
-		*.patch) msg $i; patch -p1 -i "$srcdir"/$i || return 1;;
-		esac
-	done
-}
+license="BSD"
+subpackages="$pkgname-dev $pkgname-doc $pkgname-libs"
+source="$pkgname-$pkgver.tar.gz::https://github.com/lz4/lz4/archive/v$pkgver.tar.gz"
+builddir="$srcdir"/$pkgname-$pkgver
 
 build() {
-	cd "$_builddir"
-        export PREFIX="/usr"
-        make || return 1
+	cd "$builddir"
+	make PREFIX="/usr" || return 1
 }
 
 package() {
-	cd "$_builddir"
-	make DESTDIR="$pkgdir" install || return 1
+	cd "$builddir"
+	make PREFIX="/usr" DESTDIR="$pkgdir" install || return 1
 }
 
-md5sums="42b09fab42331da9d3fb33bd5c560de9  lz4-r131.tar.gz"
-sha256sums="9d4d00614d6b9dec3114b33d1224b6262b99ace24434c53487a0c8fd0b18cfed  lz4-r131.tar.gz"
-sha512sums="60bd95d529691ffee2c43f0d8a62484c3cff74c0154094f073192606806ac8182dced61e0534ffa7e0ccf5f18e9a8cfd2738883a83814c0711a6d7f1d1b252e5  lz4-r131.tar.gz"
+sha512sums="b4e5b17fe06805e676608e636a45f0b480b79a02c6b7ffce84dc4d607861cb2652b2852493ab9d9249e7caeae6f00b6834801fdc39f58d901cbc1c7347915295  lz4-1.7.5.tar.gz"