gdb: btrace: fix indentation style

Most of this func had the incorrect indentation level (starting with 4
spaces instead of 2).

2013-05-06  Sandra Loosemore  <sandra@codesourcery.com>

        * configure.host (machine_dir, sys_dir, syscall_dir, newlib_cflags):
        Add settings for nios2*.
        * libc/include/machine/ieeefp.h (IEEE_BIG_ENDIAN, IEEE_LITTLE_ENDIAN):
        Likewise.
        * libc/include/machine/setjmp.h (JBLEN, JBTYPE): Likewise.
        * libc/machine/configure.in: Add nios2 subdir.
        * libc/machine/configure: Regenerated.
        * libc/machine/nios2/Makefile.am: New.
        * libc/machine/nios2/Makefile.in: New (autogenerated).
        * libc/machine/nios2/aclocal.m4: New (copied from mips version).
        * libc/machine/nios2/configure.in: New.
        * libc/machine/nios2/configure: New (autogenerated).
        * libc/machine/nios2/setjmp.s: New.

2013-05-06  Sandra Loosemore  <sandra@codesourcery.com>

        * COPYING.NEWLIB: Add Altera Corporation copyright.
	* symfile.c (syms_from_objfile_1): Use correct section count when
	objfile->sf == NULL.