Jbuilder: minor improvement in error reporting.

scripts/test-ocp-indent.sh

@@ -13,7 +13,7 @@ for f in  ` find \( -name _build -or \
   ocp-indent $f > $tmp_dir/$ff
   diff -U 3 $f $tmp_dir/$ff
   if [ $? -ne 0 ]; then
-    if [ $fix = "fix" ]; then
+    if [ "$fix" = "fix" ]; then
       echo "Fix indentation $f"
       cp $tmp_dir/$ff $f
     else

src/proto/alpha/jbuild

@@ -57,4 +57,5 @@ let () =
   (deps ((glob_files *.ml)
          (glob_files *.mli)
          TEZOS_PROTOCOL))
-  (action (run ${exe:../../compiler_main.exe} dummy_alpha ${path-no-dep:.}))))
+  (action (chdir ${ROOT}
+          (run ${exe:../../compiler_main.exe} dummy_alpha ${path-no-dep:.})))))