Export additional __aeabi_ symbols from arm's libgcc_s

Some programs depend on these symbols, when they are compiled for armv6
or armv7. Closes #1560 (slightly changed due to sorting of the symbols).

PR: 271087
Reported by: fuz
Submitted by: jfc@mit.edu
MFC after: 1 week

(cherry picked from commit caab831338f4eeaa7455e981478be9fd414b7969)