move externals together

Change-Id: I8c28241fc836551360711b984f8785da5e43e0e8

lingucomponent/Library_guesslang.mk

@@ -12,7 +12,10 @@ $(eval $(call gb_Library_Library,guesslang))
 
 $(eval $(call gb_Library_set_componentfile,guesslang,lingucomponent/source/languageguessing/guesslang))
 
-$(eval $(call gb_Library_use_external,guesslang,boost_headers))
+$(eval $(call gb_Library_use_externals,guesslang,\
+	boost_headers \
+	libexttextcat \
+))
 
 $(eval $(call gb_Library_use_sdk_api,guesslang))
 
@@ -25,10 +28,6 @@ $(eval $(call gb_Library_use_libraries,guesslang,\
 	$(gb_UWINAPI) \
 ))
 
-$(eval $(call gb_Library_use_externals,guesslang,\
-	libexttextcat \
-))
-
 $(eval $(call gb_Library_add_exception_objects,guesslang,\
 	lingucomponent/source/languageguessing/altstrfunc \
 	lingucomponent/source/languageguessing/guess \