[gcc] Fix more addsi patterns for nacl64 PIC

The change is similar to the previous one - GLibC compilation revealed more cases to handle.
Prevent define_expands and define_insns from treating ILP32 PIC symbol_ref as an immediate.

BUG=
TEST=

Review URL: http://codereview.chromium.org/3342027
1 file changed
tree: a1718d196d0e4713546e26996b09b7248df1b11d
  1. binutils/
  2. gcc/
  3. gdb/
  4. newlib/