classes/oeqa: Update for print statements and file() -> open() for python3

Found some more syntax cleanups needed for python3.

(From OE-Core rev: 1181d86e8707c5b8e8d43d5e785d7d9cf01fa491)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/grub-efi.bbclass

@@ -91,7 +91,7 @@ python build_efi_cfg() {
         raise bb.build.FuncFailed('Unable to read GRUB_CFG')
 
     try:
-         cfgfile = file(cfile, 'w')
+         cfgfile = open(cfile, 'w')
     except OSError:
         raise bb.build.funcFailed('Unable to open %s' % (cfile))