init: clarify some text/README about 'critical' services

'Critical' services have rebooted into bootloader, like all other
catastrophic init crashes, for years now.  Update the text to match.

Test: n/a
Change-Id: Icfc41bf3e383958f14ecfaab9ca187e2c3dc7fd9
diff --git a/init/service.h b/init/service.h
index e8d5ead..ee53adf 100644
--- a/init/service.h
+++ b/init/service.h
@@ -43,7 +43,7 @@
 #define SVC_RUNNING 0x004         // currently active
 #define SVC_RESTARTING 0x008      // waiting to restart
 #define SVC_CONSOLE 0x010         // requires console
-#define SVC_CRITICAL 0x020        // will reboot into recovery if keeps crashing
+#define SVC_CRITICAL 0x020        // will reboot into bootloader if keeps crashing
 #define SVC_RESET 0x040           // Use when stopping a process,
                                   // but not disabling so it can be restarted with its class.
 #define SVC_RC_DISABLED 0x080     // Remember if the disabled flag was set in the rc script.