Add the ability for users to specify the Google domain to use for the search.
Done per a user request that landed in plugins.guifications.org's spam bin.
-include $(PP_TOP)/local.mak
PIDGIN_TREE_TOP?=$(PP_TOP)/../../..
GTK_TOP:=$(PIDGIN_TREE_TOP)/../win32-dev/gtk_2_0
DLL_ZIP_DIR:=$(PP_TOP)/win32-dist
PP_VERSION:=$(shellcat${PP_TOP}/VERSION)
PP_CONFIG_H:=$(PP_TOP)/pp_config.h
include $(PIDGIN_TREE_TOP)/libpurple/win32/global.mak