[gnome-system-monitor/wip-charts] Add the permissive flag to cxxflags

[Robert Roth <robertroth src gnome org>]

commit 9683e6bb3b6eefecb8cdd7aa0c3621bc0749053d
Author: Robert Roth <robert roth off gmail com>
Date:   Sun Jun 3 09:19:21 2018 +0300

    Add the permissive flag to cxxflags

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 8c8557d0..9e12ea4a 100644
--- a/meson.build
+++ b/meson.build
@@ -76,7 +76,6 @@ extra_flags = [
   '-Wmissing-declarations',
   '-Wpointer-arith',
   '-Wsign-compare',
-  '-fpermissive',
 ]
 extra_cflags = [
   '-Wmissing-prototypes',
@@ -85,6 +84,7 @@ extra_cflags = [
 extra_cxxflags = [
   # '-fvisibility=hidden',
   # '-fvisibility-inlines-hidden',
+ '-fpermissive',
 ]
 
 add_project_arguments(cc.get_supported_arguments(extra_flags + extra_cflags),