qpdf: add missing dependency on jpeg

Fixes:

  configure: WARNING: unable to find required header jpeglib.h
  configure: WARNING: unable to find required library jpeg
  configure: error: some required prerequisites were not found

Signed-off-by: Olivier Schonken <olivier.schonken@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/qpdf/Config.in

@@ -3,6 +3,7 @@ config BR2_PACKAGE_QPDF
 	depends on BR2_INSTALL_LIBSTDCPP
 	select BR2_PACKAGE_PCRE
 	select BR2_PACKAGE_ZLIB
+	select BR2_PACKAGE_JPEG
 	help
 	  QPDF is a command-line program that does structural, content-
 	  preserving transformations on PDF files. It could have been called

package/qpdf/qpdf.mk

@@ -9,7 +9,7 @@ QPDF_SITE = http://downloads.sourceforge.net/project/qpdf/qpdf/$(QPDF_VERSION)
 QPDF_INSTALL_STAGING = YES
 QPDF_LICENSE = Artistic-2.0
 QPDF_LICENSE_FILES = Artistic-2.0
-QPDF_DEPENDENCIES = pcre zlib
+QPDF_DEPENDENCIES = pcre zlib jpeg
 
 QPDF_CONF_OPTS = --without-random