* common.opt (Warray-bounds): Add Warning attribute.
  (Wstrict-overflow, Wstrict-overflow=, Wcoverage-mismatch): Likewise.
  (fsized-zeroes): Add Optimization attribute.
  (fsplit-wide-types, ftree-scev-cprop): Likewise.
* c.opt (Wc++0x-compat): Add Warning attribute.

From-SVN: r122200