Import atf 0.17:

Experimental version released on February 14th, 2013.

* Added the atf_utils_cat_file, atf_utils_compare_file,
atf_utils_copy_file, atf_utils_create_file, atf_utils_file_exists,

Import atf 0.17:

Experimental version released on February 14th, 2013.

* Added the atf_utils_cat_file, atf_utils_compare_file,
atf_utils_copy_file, atf_utils_create_file, atf_utils_file_exists,
atf_utils_fork, atf_utils_grep_file, atf_utils_grep_string,
atf_utils_readline, atf_utils_redirect and atf_utils_wait utility
functions to atf-c-api. Documented the already-public
atf_utils_free_charpp function.

* Added the cat_file, compare_file, copy_file, create_file, file_exists,
fork, grep_collection, grep_file, grep_string, redirect and wait
functions to the atf::utils namespace of atf-c++-api. These are
wrappers around the same functions added to the atf-c-api library.

* Added the ATF_CHECK_MATCH, ATF_CHECK_MATCH_MSG, ATF_REQUIRE_MATCH and
ATF_REQUIRE_MATCH_MSG macros to atf-c to simplify the validation of a
string against a regular expression.

* Miscellaneous fixes for manpage typos and compilation problems with
clang.

* Added caching of the results of those configure tests that rely on
executing a test program. This should help crossbuild systems by
providing a mechanism to pre-specify what the results should be.

* PR bin/45690: Make atf-report convert any non-printable characters to
a plain-text representation (matching their corresponding hexadecimal
entities) in XML output files. This is to prevent the output of test
cases from breaking xsltproc later.

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