[include-fixer] Correct some header mappings.

[bkramer]

lg

include-fixer/find-all-symbols/STLPostfixHeaderMap.cpp

static const HeaderMapCollector::RegexHeaderMap STLPostfixHeaderMap = {
       {"bits/allocator.h$", "<string>"},
       {"bits/atomic_base.h$", "<atomic>"},
       {"bits/atomic_lockfree_defines.h$", "<exception>"},
       {"bits/basic_ios.h$", "<ios>"},
       {"bits/basic_ios.tcc$", "<ios>"},
       {"bits/basic_string.h$", "<string>"},
       {"bits/basic_string.tcc$", "<string>"},
       {"bits/char_traits.h$", "<string>"},
-      {"bits/codecvt.h$", "<fstream>"},
+      {"bits/codecvt.h$", "<locale>"},
       {"bits/concept_check.h$", "<numeric>"},
       {"bits/cpp_type_traits.h$", "<cmath>"},
       {"bits/cxxabi_forced.h$", "<cxxabi.h>"},
       {"bits/deque.tcc$", "<deque>"},
       {"bits/exception_defines.h$", "<exception>"},
       {"bits/exception_ptr.h$", "<exception>"},
       {"bits/forward_list.h$", "<forward_list>"},
       {"bits/forward_list.tcc$", "<forward_list>"},
static const HeaderMapCollector::RegexHeaderMap STLPostfixHeaderMap = {
       {"bits/istream.tcc$", "<istream>"},
       {"bits/list.tcc$", "<list>"},
       {"bits/locale_classes.h$", "<locale>"},
       {"bits/locale_classes.tcc$", "<locale>"},
       {"bits/locale_facets.h$", "<locale>"},
       {"bits/locale_facets.tcc$", "<locale>"},
       {"bits/locale_facets_nonio.h$", "<locale>"},
       {"bits/locale_facets_nonio.tcc$", "<locale>"},
-      {"bits/localefwd.h$", "<string>"},
+      {"bits/localefwd.h$", "<locale>"},
       {"bits/mask_array.h$", "<valarray>"},
-      {"bits/memoryfwd.h$", "<string>"},
+      {"bits/memoryfwd.h$", "<memory>"},
       {"bits/move.h$", "<utility>"},
       {"bits/nested_exception.h$", "<exception>"},
       {"bits/ostream.tcc$", "<ostream>"},
-      {"bits/ostream_insert.h$", "<string>"},
+      {"bits/ostream_insert.h$", "<ostream>"},
       {"bits/postypes.h$", "<iosfwd>"},
-      {"bits/ptr_traits.h$", "<unordered_set>"},
+      {"bits/ptr_traits.h$", "<memory>"},
       {"bits/random.h$", "<random>"},
       {"bits/random.tcc$", "<random>"},
-      {"bits/range_access.h$", "<string>"},
+      {"bits/range_access.h$", "<iterator>"},
       {"bits/regex.h$", "<regex>"},
       {"bits/regex_compiler.h$", "<regex>"},
       {"bits/regex_constants.h$", "<regex>"},
       {"bits/regex_cursor.h$", "<regex>"},
       {"bits/regex_error.h$", "<regex>"},
       {"bits/regex_grep_matcher.h$", "<regex>"},
       {"bits/regex_grep_matcher.tcc$", "<regex>"},
       {"bits/regex_nfa.h$", "<regex>"},
static const HeaderMapCollector::RegexHeaderMap STLPostfixHeaderMap = {
       {"bits/wchar.h$", "<cwchar>"},
       {"bits/wordsize.h$", "<csetjmp>"},
       {"bits/xopen_lim.h$", "<climits>"},
       {"include/xlocale.h$", "<cstring>"},
       {"bits/atomic_word.h$", "<memory>"},
       {"bits/basic_file.h$", "<fstream>"},
       {"bits/c++allocator.h$", "<string>"},
       {"bits/c++config.h$", "<iosfwd>"},
-      {"bits/c++io.h$", "<fstream>"},
-      {"bits/c++locale.h$", "<string>"},
+      {"bits/c++io.h$", "<ios>"},
+      {"bits/c++locale.h$", "<locale>"},
       {"bits/cpu_defines.h$", "<iosfwd>"},
       {"bits/ctype_base.h$", "<locale>"},
       {"bits/cxxabi_tweaks.h$", "<cxxabi.h>"},
       {"bits/error_constants.h$", "<system_error>"},
       {"bits/gthr-default.h$", "<memory>"},
       {"bits/gthr.h$", "<memory>"},
       {"bits/opt_random.h$", "<random>"},
       {"bits/os_defines.h$", "<iosfwd>"},