Remove -fdata-section again from the Linux build configuration: It prevented
some optimizations in gcc and clang - fewer things were recognized as constants.
Add const to pointers/arrays in some places to help compilers with determining
what is a constant. A common pattern is strlen of a string literal const char*,
or an array of function pointers.
Tested with gcc 4.8.4 / clang 3.4 and improves code qualtiy + reduces binary size.
BUG=
R=iposva@google.com, rmacnak@google.com
Review URL: https://codereview.chromium.org/1462953002 .
Florian Schneider
64e71a0b2e