main/libressl: upgrade to 2.7.5 and set pcprefix

ref #9959

main/libressl/APKBUILD

@@ -10,14 +10,15 @@
 #     - CVE-2017-8301
 #
 pkgname=libressl
-pkgver=2.7.4
+pkgver=2.7.5
 _namever=${pkgname}${pkgver%.*}
-pkgrel=2
+pkgrel=0
 pkgdesc="Version of the TLS/crypto stack forked from OpenSSL"
 url="http://www.libressl.org/"
 arch="all"
 license="custom"
 depends=""
+pcprefix="libressl:" # avoid mix up with openssl pkg-config
 makedepends_build="automake autoconf libtool"
 makedepends_host="linux-headers"
 makedepends="$makedepends_host $makedepends_build"
@@ -85,7 +86,7 @@ _libs() {
 	fi
 }
 
-sha512sums="1cd82a1bff4f655251b5feb0c850f4164e0fd548e4b404407370f74dcc75c205f42efc7787a157eecac84cbbe46af48cb63f46b3fef75f4a0a9ea19a5863a691  libressl-2.7.4.tar.gz
+sha512sums="00828dd115f6395186ce4c9cadb604612763f67f2ad2236a331062add8115f6494a655cbec237ae069e373ffb915ed4025c993e06456c3da69b279e5f7e2b8d4  libressl-2.7.5.tar.gz
 9f1628fbc2a697b6570353920d784b161ca0a122047066d8bee15225bad1e5271aa2ed72b145506bcd4ffe58b35da2caf38c4a048db7e014dabd16b5eba44581  starttls-ldap.patch
 ef8150843f5aae577a859198439673591764fb3ab1da03436607328962f084356fd7f793484c3ad5f2294bd9e8dad15644c311b0da811acbc83eed4b71c0145a  ssl-libcompat.patch
 4c992872addbe4fd612ba9e3f859b5ba69b448aafa7676751ca7ca09bbcfc47a2a1cad468c235f8d1a65c65e8efb38f27c512a32b444346c39ec0d8dcfbcd346  s_client-add-options-verify_.patch"