bug#43945: Support thumbv7a architecture

[Karl Berry]

    Hello. When I crosscompiled some app I had to patch some file
    generated by autoreconf -i, where I have to add thumbv7[arm] (using
    the analogy to armv7[arm] already present there) 

I sent the change you followed up with to config-patches. Nothing more
to do here, so closing this. Thanks.

--- a/config.sub
+++ b/config.sub
..
-       | arm | arm[bl]e | arme[lb] | armv[2-8] | armv[3-8][lb] | armv7[arm] \
+       | arm | arm[bl]e | arme[lb] | armv[2-8] | armv[3-8][lb] | armv7[arm] | 
thumbv7[arm] \