[Bug go/63269] libgo/math test failures in TestLog2

[vogt at linux dot vnet.ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63269

--- Comment #2 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
Created attachment 33506
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33506&action=edit
updated patch

Managed to get a stray character into the test between testing and committing
it.  Fixed.