[RFA/testsuite] Allow __libc_start_main above main in annota1.exp

[Andrew Cagney]

>>From the "annoying testsuite failures cleanup" department - if anyone has a
> bright idea on how to write annota tests in a more readable, less
> long-single-line fashion, I'd love to hear it.  This fixes the test on all
> my compiler/debug combinations, i386-linux.  OK to commit?
> 

Have a look at gdb_expect_list().

Andrew