This fixes a few gdb.dwarf2 tests to be more parallel-safe. This
mostly amounts to changing them to write their files into the
directory designated by standard_output_file.
Built and regtested on x86-64 Fedora 18.
* gdb.dwarf2/clztest.exp: Use standard_testfile.
* gdb.dwarf2/dw2-minsym-in-cu.exp: Use standard_testfile.
* gdb.dwarf2/fission-base.S: Remove directory from
DW_AT_GNU_dwo_name.
* gdb.dwarf2/fission-base.exp: Use build_executable. Set
debug-file-directory.
* gdb.dwarf2/fission-reread.S: Remove directory from
DW_AT_GNU_dwo_name.
* gdb.dwarf2/fission-reread.exp: Use build_executable. Set
debug-file-directory.
Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
