poppler: bump to version 0.52.0

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/poppler/poppler.hash

@@ -1,2 +1,2 @@
 # Locally calculated
-sha256	e997c9ad81a8372f2dd03a02b00692b8cc479c220340c8881edaca540f402c1f	poppler-0.51.0.tar.xz
+sha256	528b661738839f9a25f6e580fcd2d5db007e0a1948580c6489f0062798ca1992	poppler-0.52.0.tar.xz

package/poppler/poppler.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-POPPLER_VERSION = 0.51.0
+POPPLER_VERSION = 0.52.0
 POPPLER_SOURCE = poppler-$(POPPLER_VERSION).tar.xz
 POPPLER_SITE = http://poppler.freedesktop.org
 POPPLER_DEPENDENCIES = fontconfig host-pkgconf