system/conky: Patch for gcc >= 7.x.

Signed-off-by: Matteo Bernardini <ponce@slackbuilds.org>

system/conky/conky-1.10.6-gcc7.patch

@@ -0,0 +1,11 @@
+diff -Naur conky-1.10.6.orig/src/luamm.hh conky-1.10.6/src/luamm.hh
+--- conky-1.10.6.orig/src/luamm.hh	2016-12-04 16:13:57.000000000 +0100
++++ conky-1.10.6/src/luamm.hh	2017-05-05 12:44:37.525676651 +0200
+@@ -27,6 +27,7 @@
+ #include <mutex>
+ #include <exception>
+ #include <stdexcept>
++#include <functional>
+ #include <string>
+ 
+ #include <lua.hpp>

system/conky/conky.SlackBuild

@@ -87,6 +87,9 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
+# Fix for the newer gcc
+patch -p1 < $CWD/conky-1.10.6-gcc7.patch
+
 # fix MANDIR
 sed -i 's,share/man/man1,man/man1,g' CMakeLists.txt