[Buildroot] PATCH package/gettext-tiny install file host-cpu-c-abi.m4, needed by gettextsize

[Kiril Maler]

gettext-gnu tool 'gettextsize' included in gettext-tiny, searches
for file host-cpu-c-abi.m4, as shown in gettext-gnu ChangeLog

But gettext-tiny will install only files found in its m4 dir
A workaround: add a link to gettext-gnu file, so it is installed

--- a/package/gettext-tiny/gettext-tiny.mk
+++ b/package/gettext-tiny/gettext-tiny.mk
@@ -73,6 +73,11 @@ define HOST_GETTEXT_TINY_INSTALL_CMDS
  $(Q)mkdir -p $(HOST_DIR)/share/gettext-tiny/po
  $(Q)mkdir -p $(HOST_DIR)/share/gettext-tiny/m4

+ # In gettext-gnu ChangeLog:
+ # 2018-11-11  Bruno Haible  <bruno at clisp.org>
+ # gettextize: Install also host-cpu-c-abi.m4 (needed since 2018-03-24)
+ [ -e $(@D)/m4/host-cpu-c-abi.m4 ] || ln -fs
../gettext-gnu/gettext-tools/gnulib-m4/host-cpu-c-abi.m4 $(@D)/m4
+
  $(HOST_MAKE_ENV) $(MAKE) -C $(@D) \
  $(HOST_CONFIGURE_OPTS) \
  prefix=$(HOST_DIR) \
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