[gegl] meson: use "-Ofast" for optimized builds

[Ell <ell src gnome org>]

commit e67a1b9726360365abe26ccb2a22b6bffc98d80d
Author: Ell <ell_se yahoo com>
Date:   Fri Oct 25 17:15:06 2019 +0300

    meson: use "-Ofast" for optimized builds
    
    Use "-Ofast" for optimized builds, instead of the default meson
    optimization level, to match the autotools behavior.

 meson.build | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/meson.build b/meson.build
index 3137a48a2..000eba9a8 100644
--- a/meson.build
+++ b/meson.build
@@ -102,6 +102,9 @@ cflags_common += [
   '-DHAVE_CONFIG_H',
 ]
 
+if buildtype == 'debugoptimized' or buildtype == 'release'
+  cflags_common += ['-Ofast']
+endif
 
 cflags_common += [
   '-Winit-self',