package/libgpg-error: add configure option to install gpg-error-config

Upstream commit[1]

https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgpg-error.git;a=commitdiff;h=0b47de9c719b0ed0da0791f0525de073737bde5a

changed behaviour: "gpg-error-config is now only installed when enabled"

Fixes:
http://autobuild.buildroot.net/results/bc1/bc1566a0fa42f68f1f15f74a61d4081e269e1689/

[1] included in version 1.46, added in buildroot with commit b5bdcb4cc5

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Reviewed-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libgpg-error/libgpg-error.mk

@@ -15,6 +15,7 @@ LIBGPG_ERROR_CONFIG_SCRIPTS = gpg-error-config
 LIBGPG_ERROR_DEPENDENCIES = $(TARGET_NLS_DEPENDENCIES)
 LIBGPG_ERROR_CONF_OPTS = \
 	--host=$(BR2_PACKAGE_LIBGPG_ERROR_SYSCFG) \
+	--enable-install-gpg-error-config \
 	--disable-tests \
 	--disable-languages