Simplify .gitignore files.

.gitignore

@@ -38,8 +38,38 @@ Makefile.in
 /libtool
 /stamp-h1
 
+/build-aux/ar-lib
+/build-aux/config.guess
+/build-aux/config.sub
+/build-aux/depcomp
+/build-aux/diffs.patch
+/build-aux/*.elc
+/build-aux/elisp-comp
+/build-aux/install-sh
+/build-aux/*.log
+/build-aux/ltmain.sh
+/build-aux/*Makefile
+/build-aux/*Makefile?in
+/build-aux/mdate-sh
+/build-aux/missing
+/build-aux/*.patch
+/build-aux/patches*
+/build-aux/py-compile
+/build-aux/*.rej
+/build-aux/*TAGS
+/build-aux/test-driver
+/build-aux/texinfo.tex
+
+/doc/Doxyfile_user
 /doc/contributors.html
 /doc/lrde_olena.bib
 /doc/lrde_olena.cite
 /doc/lrde_olena.html
 /doc/lrde_olena_bib.html
+/doc/user-refman
+
+/m4/libtool.m4
+/m4/ltoptions.m4
+/m4/ltsugar.m4
+/m4/ltversion.m4
+/m4/lt~obsolete.m4

build-aux/.gitignore

-/ar-lib
-/config.guess
-/config.sub
-/depcomp
-/diffs.patch
-/*.elc
-/elisp-comp
-/install-sh
-/*.log
-/ltmain.sh
-/*Makefile
-/*Makefile?in
-/mdate-sh
-/missing
-/*.patch
-/patches*
-/py-compile
-/*.rej
-/*TAGS
-/test-driver
-/texinfo.tex

doc/.gitignore

-/Doxyfile_user
-/user-refman
-/user-refman.pdf
-
-/Doxyfile_devel
-/devel-refman
-/devel-refman.pdf
-
-/figures/*.png

m4/.gitignore

-/libtool.m4
-/ltoptions.m4
-/ltsugar.m4
-/ltversion.m4
-/lt~obsolete.m4