Fix -Wreorder warning.
Fixes:
.../src/crazy_linker_elf_loader.h: In constructor 'crazy::ElfLoader::ElfLoader(bool)':
.../src/crazy_linker_elf_loader.h:80:20: error: 'crazy::ElfLoader::loaded_phdr_' will be initialized after [-Werror=reorder]
.../src/crazy_linker_elf_loader.h:74:14: error: 'bool const crazy::ElfLoader::no_map_exec_support_fallback_enabled_' [-Werror=reorder]
.../src/crazy_linker_elf_loader.cpp:24:1: error: when initialized here [-Werror=reorder]
BUG=398425,390618
Review URL: https://codereview.chromium.org/
719713003
Cr-Commit-Position: refs/heads/master@{#303867}