main/ccache: upgrade to 3.1.8

main/ccache/APKBUILD

 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=ccache
-pkgver=3.1.7
+pkgver=3.1.8
 pkgrel=0
 pkgdesc="ccache is a compiler cache"
 url="http://ccache.samba.org/"
@@ -34,4 +34,4 @@ package() {
 	ln -sf /usr/bin/ccache "$pkgdir"/usr/lib/ccache/bin/${CHOST}-cpp
 	ln -sf /usr/bin/ccache "$pkgdir"/usr/lib/ccache/bin/${CHOST}-c++
 }
-md5sums="bf49574730fabd666fc7ec3f8b203f41  ccache-3.1.7.tar.gz"
+md5sums="60799b763cbad7ea47c1a919089e5cf9  ccache-3.1.8.tar.gz"