download clucene tarball only when it's going to be used

Change-Id: I568be2e912d5700ef5d24443e48cf7d0a384292a

clucene/UnpackedTarball_clucene.mk

@@ -9,7 +9,7 @@
 
 $(eval $(call gb_UnpackedTarball_UnpackedTarball,clucene))
 
-$(eval $(call gb_UnpackedTarball_set_tarball,clucene,48d647fbd8ef8889e5a7f422c1bfda94-clucene-core-2.3.3.4.tar.gz))
+$(eval $(call gb_UnpackedTarball_set_tarball,clucene,$(CLUCENE_TARBALL)))
 
 $(eval $(call gb_UnpackedTarball_fix_cxx_suffix,clucene,cpp))
 

config_host.mk.in

@@ -50,6 +50,7 @@ export CLASSPATH=@CLASSPATH@
 export CL_X64=@CL_X64@
 export CLUCENE_CFLAGS=@CLUCENE_CFLAGS@
 export CLUCENE_LIBS=@CLUCENE_LIBS@
+export CLUCENE_TARBALL=@CLUCENE_TARBALL@
 export COM=@COM@
 export COM_GCC_IS_CLANG=@COM_GCC_IS_CLANG@
 export COMEX=@COMEX@

configure.in

@@ -6526,11 +6526,13 @@ if test "$with_system_clucene" = "yes"; then
 else
     AC_MSG_RESULT([internal])
     SYSTEM_CLUCENE=NO
+    CLUCENE_TARBALL=48d647fbd8ef8889e5a7f422c1bfda94-clucene-core-2.3.3.4.tar.gz
     BUILD_TYPE="$BUILD_TYPE CLUCENE"
 fi
 AC_SUBST(SYSTEM_CLUCENE)
 AC_SUBST(CLUCENE_CFLAGS)
 AC_SUBST(CLUCENE_LIBS)
+AC_SUBST(CLUCENE_TARBALL)
 
 dnl ===================================================================
 dnl Check for system expat

ooo.lst.in

@@ -22,7 +22,7 @@ cfbf1ac6f61bf6cf45342a0cc9381be5-liberation-fonts-ttf-2.00.0.tar.gz
 3ade8cfe7e59ca8e65052644fed9fca4-epm-3.7.tar.gz
 3c219630e4302863a9a83d0efde889db-commons-logging-1.1.1-src.tar.gz
 48470d662650c3c074e1c3fabbc67bbd-README_source-9.0.0.7-bj.txt
-48d647fbd8ef8889e5a7f422c1bfda94-clucene-core-2.3.3.4.tar.gz
+@CLUCENE_TARBALL@
 4a660ce8466c9df01f19036435425c3a-glibc-2.1.3-stub.tar.gz
 f101a9e88b783337b20b2e26dfd26d5f-cairo-1.10.2.tar.gz
 599dc4cc65a07ee868cf92a667a913d2-xpdf-3.02.tar.gz