Merge branch 'topic/84fix3' into 'master'

Makefile: fix IMPACTDB_DIR var default value for ancr envs on Windows

See merge request eng/libadalang/langkit-query-language!517

Author: thvnx

Makefile

@@ -15,7 +15,7 @@ NPMRC=
 BUILD_DIR=/undefined
 LKQL_DIR=$(BUILD_DIR)/lkql
 # Default impact-db directory as set in an ancr devenv
-IMPACTDB_DIR=$(ANCR_ROOT_DIR)/src/impact-db
+IMPACTDB_DIR=$(ANCR_ROOT_DIR_POSIX)/src/impact-db
 GPRBUILD=gprbuild -j$(PROCS) -p -XBUILD_MODE=$(BUILD_MODE)
 GPRINSTALL=gprinstall --prefix=$(PREFIX) -p -XBUILD_MODE=$(BUILD_MODE)
 BUILD_FOR_JIT=false