maint: ensure .deps/ in the project root is ignored by git

* .gitignore (.deps/): Add entry.
* find/.gitignore (/.deps/): Remove here.
* lib/.gitignore: Likewise.
* locate/.gitignore: Likewise.
* xargs/.gitignore: Likewise.

.gitignore

@@ -14,6 +14,7 @@ config.rpath
 config.status
 config.sub
 configure
+.deps/
 /gl/
 /gnulib-tests/
 /GNUmakefile

find/.gitignore

@@ -1,6 +1,5 @@
 /*.o
 /*~
-/.deps/
 /Makefile
 /Makefile.in
 /find

lib/.gitignore

@@ -1,7 +1,6 @@
 /*.log
 /*.o
 /*.trs
-/.deps/
 /Makefile
 /Makefile.in
 /check-regexprops

locate/.gitignore

@@ -1,6 +1,5 @@
 *~
 /*.o
-/.deps/
 Makefile
 Makefile.in
 config.h.in

xargs/.gitignore

@@ -1,6 +1,5 @@
 *~
 /*.o
-/.deps/
 Makefile
 Makefile.in
 xargs