android: create intermediate dir for build variants

It is better to separate the intermediate asset files

Change-Id: I50ff1b6e045679afa48c7024652de40db8fa2a71
Reviewed-on: https://gerrit.libreoffice.org/c/online/+/95366
Tested-by: Jenkins
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Henry Castro <hcastro@collabora.com>

.gitignore

@@ -56,8 +56,8 @@ loolwsd.log
 *.mo
 
 # loleaflet
-loleaflet/build
-loleaflet/dist
+loleaflet/debug
+loleaflet/release
 loleaflet/npm-shrinkwrap.json
 loleaflet/jsconfig.json
 loleaflet/admin/jsconfig.json

loleaflet/Makefile.am

@@ -322,7 +322,7 @@ COMMA := ,
 EMPTY :=
 SPACE := $(EMPTY) $(EMPTY)
 LOLEAFLET_VERSION = $(shell cd $(srcdir) && git log -1 --pretty=format:"%h")
-INTERMEDIATE_DIR ?= $(abs_builddir)/build
+INTERMEDIATE_DIR ?= $(if $(IS_DEBUG),$(abs_builddir)/debug,$(abs_builddir)/release)
 
 EXTRA_DIST = $(shell find . -type f -not -path './.git/*' | sed 's/.\///')