[source] gettext-full: avoid using iconv for host builds

[LEDE Commits]

jow pushed a commit to source.git, branch master:
https://git.lede-project.org/b95494baedbc46d088550e18370e3507af4f732e

commit b95494baedbc46d088550e18370e3507af4f732e
Author: Jo-Philipp Wich <jo at mein.io>
AuthorDate: Wed Jan 11 03:44:51 2017 +0100

    gettext-full: avoid using iconv for host builds
    
    The gettext-full host build might pick up iconv-stub host build  headers
    during the build, leading to stray linker errors with unresolved references
    to libiconv_open(), libiconv() and libiconv_close().
    
    Since we're not needing iconv support on the host, pass the appropriate
    cache variables to configure to prevent detection and linking of iconv.
    
    Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 package/libs/gettext-full/Makefile | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/package/libs/gettext-full/Makefile b/package/libs/gettext-full/Makefile
index d293e30..deb4840 100644
--- a/package/libs/gettext-full/Makefile
+++ b/package/libs/gettext-full/Makefile
@@ -71,7 +71,10 @@ HOST_CONFIGURE_ARGS += \
 
 
 HOST_CONFIGURE_VARS += \
-	EMACS="no"
+	EMACS="no" \
+	am_cv_lib_iconv=no \
+	am_cv_func_iconv=no \
+	ac_cv_header_iconv_h=no \
 
 define Build/InstallDev
 	$(INSTALL_DIR) $(1)/usr/lib/libintl-full/include