[gcc] Fix SIGSEGV in computed goto compilation.

BUG=http://code.google.com/p/nativeclient/issues/detail?id=601
TEST=

Review URL: http://codereview.chromium.org/3345011
1 file changed
tree: 333d0ba2b976a6de38558e37e3e9e0d5ec287f45
  1. binutils/
  2. gcc/
  3. gdb/
  4. newlib/