[atk] build: Correct Darwin linker options

[Philip Chimento <pchimento src gnome org>]

commit 0ae3ec7578f1638b067f0e26bac5b0c52db82b60
Author: Philip Chimento <philip chimento gmail com>
Date:   Sat Apr 7 23:45:48 2018 -0700

    build: Correct Darwin linker options
    
    The Darwin linker doesn't want equal signs here.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=795065

 meson.build |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/meson.build b/meson.build
index 9a224ef..b2384bd 100644
--- a/meson.build
+++ b/meson.build
@@ -82,7 +82,7 @@ endif
 
 # Maintain compatibility with autotools on macOS
 if host_machine.system() == 'darwin'
-  common_ldflags += [ '-compatibility_version=1', '-current_version=1.0', ]
+  common_ldflags += [ '-compatibility_version 1', '-current_version 1.0', ]
 endif
 
 # Functions