meson: add option to enable/disable the test suite

meson.build

@@ -242,7 +242,10 @@ libepoxy_inc = [
 
 subdir('include/epoxy')
 subdir('src')
-subdir('test')
+
+if get_option('tests')
+  subdir('test')
+endif
 
 if get_option('docs')
   doxygen = find_program('doxygen', required: false)

meson_options.txt

@@ -15,3 +15,7 @@ option('x11',
        type: 'boolean',
        value: true,
        description: 'Enable X11 support (GLX or EGL-X11)')
+option('tests',
+       type: 'boolean',
+       value: true,
+       description: 'Build the test suite')