package/libraw: needs autoreconf

configure is older than configure.ac in official libraw 0.20.2 tarball:
https://github.com/LibRaw/LibRaw/issues/353

Fixes:
 - http://autobuild.buildroot.org/results/abef2ac14a959093a6391cad28e738558e15ceec

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libraw/libraw.mk

@@ -14,6 +14,8 @@ LIBRAW_CONF_OPTS += \
 LIBRAW_LICENSE = LGPL-2.1 or CDDL-1.0
 LIBRAW_LICENSE_FILES = LICENSE.LGPL LICENSE.CDDL README.md
 LIBRAW_DEPENDENCIES = host-pkgconf
+# https://github.com/LibRaw/LibRaw/issues/353
+LIBRAW_AUTORECONF = YES
 LIBRAW_CXXFLAGS = $(TARGET_CXXFLAGS)
 LIBRAW_CONF_ENV = CXXFLAGS="$(LIBRAW_CXXFLAGS)"