v4 cups: Shouldn't link against libgcrypt without using gcrypt functions

Backported from http://www.cups.org/strfiles.php/3308/cups-no-gcrypt.patch

This addresses the cryto dependency seen during build.

(From OE-Core rev: e5f9166302baad837244e5a93bedb2797ab17e57)

Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/cups/cups.inc

@@ -8,6 +8,7 @@ SRC_URI = "http://www.cups.org/software/${PV}/${BP}-source.tar.bz2 \
            file://use_echo_only_in_init.patch \
            file://0001-don-t-try-to-run-generated-binaries.patch \
            file://cups_serverbin.patch \
+           file://cups-no-gcrypt.patch \
 	  "
 
 LEAD_SONAME = "libcupsdriver.so"

meta/recipes-extended/cups/cups/cups-no-gcrypt.patch

@@ -0,0 +1,49 @@
+Description: Don't build-depend on libgcrypt, as nothing is used from it
+Author: Didier Raboud <odyx@debian.org>
+Bug-Debian: https://bugs.debian.org/638416
+Bug: http://www.cups.org/str.php?L????
+
+[CUPS Ticket #4399] -- http://www.cups.org/str.php?L4399
+
+Backported from http://www.cups.org/strfiles.php/3308/cups-no-gcrypt.patch
+
+Upstream-Status: Backport 
+
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+Last-Update: 2014-04-07
+--- a/config-scripts/cups-ssl.m4
++++ b/config-scripts/cups-ssl.m4
+@@ -66,7 +66,6 @@
+     dnl Then look for GNU TLS...
+     if test $have_ssl = 0 -a "x$enable_gnutls" != "xno" -a "x$PKGCONFIG" != x; then
+     	AC_PATH_PROG(LIBGNUTLSCONFIG,libgnutls-config)
+-    	AC_PATH_PROG(LIBGCRYPTCONFIG,libgcrypt-config)
+ 	if $PKGCONFIG --exists gnutls; then
+ 	    have_ssl=1
+ 	    SSLLIBS=`$PKGCONFIG --libs gnutls`
+@@ -84,14 +83,6 @@
+ 	if test $have_ssl = 1; then
+ 	    CUPS_SERVERCERT="ssl/server.crt"
+ 	    CUPS_SERVERKEY="ssl/server.key"
+-
+-            if $PKGCONFIG --exists gcrypt; then
+-	        SSLLIBS="$SSLLIBS `$PKGCONFIG --libs gcrypt`"
+-	        SSLFLAGS="$SSLFLAGS `$PKGCONFIG --cflags gcrypt`"
+-	    elif test "x$LIBGCRYPTCONFIG" != x; then
+-	        SSLLIBS="$SSLLIBS `$LIBGCRYPTCONFIG --libs`"
+-	        SSLFLAGS="$SSLFLAGS `$LIBGCRYPTCONFIG --cflags`"
+-	    fi
+ 	fi
+     fi
+ 
+--- a/cups/http-private.h
++++ b/cups/http-private.h
+@@ -80,7 +80,6 @@
+ #  elif defined HAVE_GNUTLS
+ #    include <gnutls/gnutls.h>
+ #    include <gnutls/x509.h>
+-#    include <gcrypt.h>
+ #  elif defined(HAVE_CDSASSL)
+ #    include <CoreFoundation/CoreFoundation.h>
+ #    include <Security/Security.h>