[gnome-builder] terminal: check for pcre2.h

[Christian Hergert <chergert src gnome org>]

commit e6bc5f82bf886e506c0545ff5af2e82a02c28d4e
Author: Christian Hergert <chergert redhat com>
Date:   Tue Sep 10 15:59:07 2019 -0700

    terminal: check for pcre2.h
    
    Fixes #1032

 src/libide/terminal/meson.build | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/libide/terminal/meson.build b/src/libide/terminal/meson.build
index 9de863d1f..1d7c9f727 100644
--- a/src/libide/terminal/meson.build
+++ b/src/libide/terminal/meson.build
@@ -3,6 +3,9 @@ libide_include_directories += include_directories('.')
 
 libide_terminal_generated_headers = []
 
+# Ensure we have PCRE2 available
+cc.has_header('pcre2.h', required: true)
+
 #
 # Public API Headers
 #