[13u] RFR: 8240972: macOS codesign fail on macOS 10.13.5 or older

[Andrew Brygin]

Hello,

 I would like to backport the fix for JDK-8240972 to 13u:

Bug: https://bugs.openjdk.java.net/browse/JDK-8240972
Original change: https://hg.openjdk.java.net/jdk/jdk/rev/4253bf176649
Webrev: http://cr.openjdk.java.net/~bae/13u/8240972/webrev.00

 The original change modifies file make/autoconf/basic_tools.m4 which
does not exist in jdk13u due to absence of the fix for JDK-8239708.
However, the same change applies cleanly to make/autoconf/basics.m4.


Thanks,
Andrew