[gnome-builder] meson: Extract -include flags from compile flags

[Patrick Griffis <pgriffis src gnome org>]

commit 271ef4e9d263bed8a62e0eb24c766e85c4c9a08a
Author: Patrick Griffis <tingping tingping se>
Date:   Fri Aug 4 17:48:24 2017 -0400

    meson: Extract -include flags from compile flags

 plugins/meson/meson_plugin/__init__.py |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/plugins/meson/meson_plugin/__init__.py b/plugins/meson/meson_plugin/__init__.py
index 352b0f1..6952cc7 100644
--- a/plugins/meson/meson_plugin/__init__.py
+++ b/plugins/meson/meson_plugin/__init__.py
@@ -47,13 +47,15 @@ def execInRuntime(runtime, *args, **kwargs):
 def extract_flags(command: str, builddir: str):
     flags = GLib.shell_parse_argv(command)[1] # Raises on failure
     wanted_flags = []
-    for flag in flags:
+    for i, flag in enumerate(flags):
         if flag.startswith('-I'):
             # All paths are relative to build
             abspath = path.normpath(path.join(builddir, flag[2:]))
             wanted_flags.append('-I' + abspath)
         elif flag.startswith(('-isystem', '-W', '-D', '-std')):
             wanted_flags.append(flag)
+        elif flag == '-include':
+            wanted_flags += [flag, flags[i + 1]]
     return wanted_flags
 
 class MesonBuildSystem(Ide.Object, Ide.BuildSystem, Gio.AsyncInitable):