use explicit paths for ignoring compiled OSX & linux programs

(otherwise changes in matching folders don't get picked up, e.g. in the `tx` folder)

.gitignore

@@ -18,16 +18,16 @@ htmlcov
 .pytest_cache
 
 # ignore the OSX and linux compiled programs
-autohintexe
-detype1
-makeotfexe
-mergefonts
-rotatefont
-sfntdiff
-sfntedit
-spot
-tx
-type1
+c/build_all/autohintexe
+c/build_all/detype1
+c/build_all/makeotfexe
+c/build_all/mergefonts
+c/build_all/rotatefont
+c/build_all/sfntdiff
+c/build_all/sfntedit
+c/build_all/spot
+c/build_all/tx
+c/build_all/type1
 
 # ignore the temp build directories and files
 *.o