- localstatedir does not belong under prefix
- Remove hardcoding of optimization

Index: meson.build
--- meson.build.orig
+++ meson.build
@@ -1802,7 +1802,7 @@ config_host_data.set('CONFIG_QEMU_FIRMWAREPATH', qemu_
 config_host_data.set_quoted('CONFIG_QEMU_HELPERDIR', get_option('prefix') / get_option('libexecdir'))
 config_host_data.set_quoted('CONFIG_QEMU_ICONDIR', get_option('prefix') / qemu_icondir)
 config_host_data.set_quoted('CONFIG_QEMU_LOCALEDIR', get_option('prefix') / get_option('localedir'))
-config_host_data.set_quoted('CONFIG_QEMU_LOCALSTATEDIR', get_option('prefix') / get_option('localstatedir'))
+config_host_data.set_quoted('CONFIG_QEMU_LOCALSTATEDIR', get_option('localstatedir'))
 config_host_data.set_quoted('CONFIG_QEMU_MODDIR', get_option('prefix') / qemu_moddir)
 config_host_data.set_quoted('CONFIG_SYSCONFDIR', get_option('prefix') / get_option('sysconfdir'))
 
@@ -3810,9 +3810,6 @@ if targetos == 'darwin'
   summary_info += {'Objective-C compiler': ' '.join(meson.get_compiler('objc').cmd_array())}
 endif
 option_cflags = (get_option('debug') ? ['-g'] : [])
-if get_option('optimization') != 'plain'
-  option_cflags += ['-O' + get_option('optimization')]
-endif
 summary_info += {'CFLAGS':            ' '.join(get_option('c_args') + option_cflags)}
 if link_language == 'cpp'
   summary_info += {'CXXFLAGS':        ' '.join(get_option('cpp_args') + option_cflags)}