new xxhash port

ports/x/xxhash/Pkgfile

@@ -0,0 +1,13 @@
+# Description: extremely fast, noncryptographic hash algorithm
+# URL: https://github.com/Cyan4973/xxHash
+# Maintainer: Alexander Zhirov
+
+name=xxhash
+version=0.8.2
+release=1
+source=(https://github.com/Cyan4973/xxHash/archive/v$version/$name-$version.tar.gz)
+
+build() {
+    cd xxHash-$version
+    make PREFIX=/usr DESTDIR=$PKG install
+}