oe.types.path: Use with to control file handle lifetime

(From OE-Core rev: b6e7fee68d018e5f148a7a02cf110bc210022a72)

Signed-off-by: Ola x Nilsson <olani@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oe/types.py

@@ -154,7 +154,8 @@ def path(value, relativeto='', normalize='true', mustexist='false'):
 
     if boolean(mustexist):
         try:
-            open(value, 'r')
+            with open(value, 'r'):
+                pass
         except IOError as exc:
             if exc.errno == errno.ENOENT:
                 raise ValueError("{0}: {1}".format(value, os.strerror(errno.ENOENT)))
@@ -183,4 +184,3 @@ def qemu_use_kvm(kvm, target_arch):
         elif build_arch == target_arch:
             use_kvm = True
     return use_kvm
-