Rename build_home to repo in tool/make-standalone-distribution.sh for clarity

Author: eregon

tool/make-standalone-distribution.sh

@@ -65,7 +65,7 @@ export TRUFFLERUBY_RESILIENT_GEM_HOME=true
 
 # Build
 cd truffleruby
-build_home=$(pwd -P)
+repo=$(pwd -P)
 
 cd ../graal/vm
 mx --dy truffleruby,/substratevm sversions
@@ -98,5 +98,5 @@ TRUFFLERUBY_RECOMPILE_OPENSSL=true "$release_home/lib/truffle/post_install_hook.
 "$release_home/bin/ruby" -v
 
 # Run all specs
-cd "$build_home"
+cd "$repo"
 AOT_BIN="$release_home/bin/truffleruby" tool/jt.rb test --native :all