* invoke.texi: Add documentation for -muninit-const-in-rodata.
* config/mips/mips.h (MASK_UNINIT_CONST_IN_RODATA): Define.
(TARGET_UNINIT_CONST_IN_RODATA): Define.
(text_section): Add switches -munint-const-in-rodata and
-mno-uninit-const-in-rodata.
(ASM_OUTPUT_COMMON): Remove.
(ASM_OUTPUT_ALIGNED_DECL_COMMON): Define. Check if uninitialized
const objects should be placed in read-only data. Otherwise declare
them in common.
From-SVN: r30562
