[gobject-introspection] docs: include '--c-include' in g-ir-scanner man page. Fixes #275

[Christoph Reiter <creiter src gnome org>]

commit e695a4fec2b44117d0fbe800eae20d7e87e9bcc5
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Sun Mar 24 12:37:20 2019 +0100

    docs: include '--c-include' in g-ir-scanner man page. Fixes #275

 docs/g-ir-scanner.1                 | 4 ++++
 docs/website/tools/g-ir-scanner.rst | 4 ++++
 2 files changed, 8 insertions(+)
---
diff --git a/docs/g-ir-scanner.1 b/docs/g-ir-scanner.1
index 2078d927..c890291e 100644
--- a/docs/g-ir-scanner.1
+++ b/docs/g-ir-scanner.1
@@ -90,6 +90,10 @@ Include this directory in the list of directories to be searched for
 header files. You need to pass to the scanner all the directories you\(aqd
 normally pass to the compiler when using the specified source files.
 .TP
+.BI \-\-c\-include\fB= C_INCLUDES
+Headers which should be included in C programs. This option can be
+specified multiple times to include more than one header.
+.TP
 .BI \-n\fP,\fB  \-\-namespace\fB= NAME
 The namespace name. This name should be capitalized, eg the first letter
 should be upper case. Examples: Gtk, Clutter, WebKit.
diff --git a/docs/website/tools/g-ir-scanner.rst b/docs/website/tools/g-ir-scanner.rst
index d59e7ccc..fc6abe3e 100644
--- a/docs/website/tools/g-ir-scanner.rst
+++ b/docs/website/tools/g-ir-scanner.rst
@@ -75,6 +75,10 @@ OPTIONS
     header files. You need to pass to the scanner all the directories you'd
     normally pass to the compiler when using the specified source files.
 
+--c-include=C_INCLUDES
+    Headers which should be included in C programs. This option can be
+    specified multiple times to include more than one header.
+
 -n, --namespace=NAME
     The namespace name. This name should be capitalized, eg the first letter
     should be upper case. Examples: Gtk, Clutter, WebKit.