[latexila] build: ignore all *.m4

[Sébastien Wilmet <swilmet src gnome org>]

commit db131f436d5b951cb0282f9afcf38b7d10e5b6fc
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Jul 13 08:24:23 2017 +0200

    build: ignore all *.m4

 Makefile.am   |   22 +------------
 m4/.gitignore |    1 +
 m4/vapigen.m4 |  101 ---------------------------------------------------------
 3 files changed, 2 insertions(+), 122 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 10063fc..7e60184 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -25,26 +25,6 @@ MAINTAINERCLEANFILES =               \
        $(GITIGNORE_MAINTAINERCLEANFILES_MAKEFILE_IN) \
        $(GITIGNORE_MAINTAINERCLEANFILES_M4_LIBTOOL) \
        gtk-doc.make \
-       INSTALL \
-       m4/appstream-xml.m4 \
-       m4/ax_append_compile_flags.m4 \
-       m4/ax_append_flag.m4 \
-       m4/ax_append_link_flags.m4 \
-       m4/ax_check_compile_flag.m4 \
-       m4/ax_check_link_flag.m4 \
-       m4/ax_code_coverage.m4 \
-       m4/ax_compiler_flags_cflags.m4 \
-       m4/ax_compiler_flags_gir.m4 \
-       m4/ax_compiler_flags_ldflags.m4 \
-       m4/ax_compiler_flags.m4 \
-       m4/ax_is_release.m4 \
-       m4/ax_require_defined.m4 \
-       m4/gsettings.m4 \
-       m4/gtk-doc.m4 \
-       m4/intltool.m4 \
-       m4/introspection.m4 \
-       m4/nls.m4 \
-       m4/pkg.m4 \
-       m4/yelp.m4
+       INSTALL
 
 -include $(top_srcdir)/git.mk
diff --git a/m4/.gitignore b/m4/.gitignore
new file mode 100644
index 0000000..0f4126c
--- /dev/null
+++ b/m4/.gitignore
@@ -0,0 +1 @@
+*.m4