[Bug driver/66849] Incorrect multilib chosen with -mthumb -mfloat-abi=hard

[simon at pushface dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66849

--- Comment #1 from simon at pushface dot org ---
I should have said, I’m interested in Cortex-M3 and Cortex-M4{F); and possibly
Cortex-M7(F).