x11/brisk-menu: Attempt to fix build order bug (D29353)

Uncovered while building with devel/samurai but can probably also
happen with ninja eventually.

In file included from ../src/mate-applet/applet.c:19:
In file included from ../src/frontend/classic/classic-window.h:14:
../src/frontend/classic/../menu-private.h:18:10: fatal error: 'libsaver-glue.h' file not found
 #include "libsaver-glue.h"
         ^~~~~~~~~~~~~~~~~
1 error generated.
samu: subcommands failed

http://package18.nyi.freebsd.org/data/122amd64-default-foo/2021-04-04_07h37m38s/logs/errors/brisk-menu-0.6.2.log

PR:		254678

x11/brisk-menu/files/patch-src_meson.build

@@ -0,0 +1,20 @@
+Attempt to unbreak parallel build
+
+--- src/meson.build.orig	2021-04-05 04:30:02 UTC
++++ src/meson.build
+@@ -13,6 +13,7 @@ libresources = static_library(
+
+ link_libresources = declare_dependency(
+     link_with: libresources,
++    sources: brisk_resources,
+     include_directories: [
+         data_include,
+     ],
+@@ -38,6 +39,7 @@ libsession_stub = static_library(
+ # Allow linking to the stub
+ link_libsession_stub = declare_dependency(
+     link_with: libsession_stub,
++    sources: [libsaver_glue, libsession_glue],
+     dependencies: [
+         dep_gio_unix,
+     ],