config.gcc (xtensa-*-elf*): Removed assignments to with_newlib, extra_parts, and fixincludes.
* config.gcc (xtensa-*-elf*): Removed assignments to with_newlib,
extra_parts, and fixincludes. Add xtensa/t-elf tmake_file.
(xtensa-*-linux*): Add xtensa/t-linux tmake_file.
* config/xtensa/crti.asm: New file.
* config/xtensa/crtn.asm: New file.
* config/xtensa/t-elf: New file.
* config/xtensa/t-linux: New file.
* config/xtensa/t-xtensa: Add rules for crti.o and crtn.o.
Move various CFLAGS settings to new t-elf file.