[gtksourceview] build: ignore all *.m4

[Sébastien Wilmet <swilmet src gnome org>]

commit 28a7d5a3001bc21bd70ca6526836a6e08f51ac9f
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Jul 13 08:46:26 2017 +0200

    build: ignore all *.m4
    
    It's simpler than listing all *.m4 in the Makefile.am.
    
    vapigen.m4 is removed, this will have the benefit to take the latest
    version.

 Makefile.am   |   52 +-----------------------------
 m4/.gitignore |    1 +
 m4/vapigen.m4 |  101 ---------------------------------------------------------
 3 files changed, 2 insertions(+), 152 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index bf0be8f..5dadfc1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -22,56 +22,6 @@ MAINTAINERCLEANFILES = \
        $(GITIGNORE_MAINTAINERCLEANFILES_MAKEFILE_IN) \
        $(GITIGNORE_MAINTAINERCLEANFILES_M4_LIBTOOL) \
        gtk-doc.make \
-       INSTALL \
-       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_pkg_check_modules.m4 \
-       m4/ax_require_defined.m4 \
-       m4/ax_valgrind_check.m4 \
-       m4/codeset.m4 \
-       m4/extern-inline.m4 \
-       m4/fcntl-o.m4 \
-       m4/gettext.m4 \
-       m4/glibc21.m4 \
-       m4/glibc2.m4 \
-       m4/gtk-3.0.m4 \
-       m4/gtk-doc.m4 \
-       m4/iconv.m4 \
-       m4/intdiv0.m4 \
-       m4/intldir.m4 \
-       m4/intl.m4 \
-       m4/intlmacosx.m4 \
-       m4/intmax.m4 \
-       m4/introspection.m4 \
-       m4/inttypes_h.m4 \
-       m4/inttypes-pri.m4 \
-       m4/lcmessage.m4 \
-       m4/lib-ld.m4 \
-       m4/lib-link.m4 \
-       m4/lib-prefix.m4 \
-       m4/lock.m4 \
-       m4/longlong.m4 \
-       m4/nls.m4 \
-       m4/pkg.m4 \
-       m4/po.m4 \
-       m4/printf-posix.m4 \
-       m4/progtest.m4 \
-       m4/size_max.m4 \
-       m4/stdint_h.m4 \
-       m4/threadlib.m4 \
-       m4/uintmax_t.m4 \
-       m4/visibility.m4 \
-       m4/wchar_t.m4 \
-       m4/wint_t.m4 \
-       m4/xsize.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