enable 7seg by default for CI

Fix a build issue with 7seg.cpp

Change-Id: Iaeab1fd47612742c3ca1783fcd357769c802c7eb
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/7seg.cpp b/7seg.cpp
index daa71f9..da8b2ba 100644
--- a/7seg.cpp
+++ b/7seg.cpp
@@ -64,7 +64,7 @@
     signal(SIGINT, [](int signum) {
         if (signum == SIGINT)
         {
-            sig_recv = true:
+            sig_recv = true;
         }
     });
 
diff --git a/meson.build b/meson.build
index 4655c16..59b5a38 100644
--- a/meson.build
+++ b/meson.build
@@ -66,7 +66,7 @@
   install: true,
 )
 
-if get_option('7seg').enabled()
+if not get_option('7seg').disabled()
   udevdir = dependency('udev', required : false).get_pkgconfig_variable('udevdir')
   assert(udevdir != '', 'Cannot find udevdir')
   install_data(['80-7seg.rules'], install_dir : udevdir)