RepositoryExternal.mk: fix poppler linking on Ubuntu

need to link poppler static library *before* jpeg

Change-Id: I0fd2abc12c93432715a02a3a567349abda4f990b

RepositoryExternal.mk

@@ -2771,7 +2771,6 @@ endef
 else # !SYSTEM_POPPLER
 
 define gb_LinkTarget__use_poppler
-$(call gb_LinkTarget_use_external,$(1),jpeg)
 $(call gb_LinkTarget_use_external_project,$(1),poppler,full)
 
 $(call gb_LinkTarget_set_include,$(1),\
@@ -2787,6 +2786,8 @@ $(call gb_LinkTarget_add_libs,$(1),\
 	$(call gb_UnpackedTarball_get_dir,poppler)/poppler/.libs/libpoppler$(gb_StaticLibrary_PLAINEXT) \
 )
 
+$(call gb_LinkTarget_use_external,$(1),jpeg)
+
 ifeq ($(OS),MACOSX)
 $(call gb_LinkTarget_add_libs,$(1),\
 	-lobjc \