main/libxslt: security upgrade to 1.1.27 (CVE-2012-2870)

fixes #1437

main/libxslt/APKBUILD

 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=libxslt
-pkgver=1.1.26
-pkgrel=4
+pkgver=1.1.27
+pkgrel=0
 pkgdesc="XML stylesheet transformation library"
 url="http://xmlsoft.org/XSLT/"
 license="custom"
@@ -27,4 +27,4 @@ py() {
 	install -d "$subpkgdir"/usr/lib
 	mv "$pkgdir"/usr/lib/python* "$subpkgdir"/usr/lib/
 }
-md5sums="e61d0364a30146aaa3001296f853b2b9  libxslt-1.1.26.tar.gz"
+md5sums="4d01ff464b9ea7236925a1adf147c7f8  libxslt-1.1.27.tar.gz"