Fix a duplicate OS class.

It had Android 6 twice; should be Android 6 and Android 7.

Author: david

nmap-os-db

@@ -31154,8 +31154,8 @@ Class Google | Android | 5.X | phone
 CPE cpe:/o:google:android:5 auto
 Class Google | Android | 6.X | phone
 CPE cpe:/o:google:android:6 auto
-Class Google | Android | 6.X | phone
-CPE cpe:/o:google:android:6 auto
+Class Google | Android | 7.X | phone
+CPE cpe:/o:google:android:7 auto
 Class Linux | Linux | 3.X | phone
 CPE cpe:/o:linux:linux_kernel:3 auto
 SEQ(SP=FB-10A%GCD=1-6%ISR=103-113%TI=Z%CI=I|Z|RD%II=I%TS=6|7)