Update .gitorder

Author: tkoeppe

.gitorder

@@ -5,6 +5,7 @@ source/macros.tex
 source/tables.tex
 source/cover-*.tex
 source/front.tex
+source/preface.tex
 source/intro.tex
 source/lex.tex
 source/basic.tex
@@ -21,22 +22,24 @@ source/lib-intro.tex
 source/support.tex
 source/concepts.tex
 source/diagnostics.tex
+source/memory.tex
+source/meta.tex
 source/utilities.tex
-source/strings.tex
 source/containers.tex
 source/iterators.tex
 source/ranges.tex
 source/algorithms.tex
+source/strings.tex
+source/text.tex
 source/numerics.tex
 source/time.tex
-source/locales.tex
 source/iostreams.tex
-source/regex.tex
-source/atomics.tex
 source/threads.tex
+source/exec.tex
 source/grammar.tex
 source/limits.tex
 source/compatibility.tex
 source/future.tex
+source/uax31.tex
 source/back.tex
 source/xrefdelta.tex