Quiesce warning around gcc_assert() for an inline macro that uses
a static variable.  This code has been moved around in gcc, but is still in
use in the latest trunk version of the compiler.

gnu/lib/libgcc/../../../contrib/gcc/unwind-dw2.c:208:36:
      warning: static variable 'dwarf_reg_size_table' is used in an inline
               function with external linkage [-Wstatic-in-inline]
gcc_assert (index < (int) sizeof(dwarf_reg_size_table));