RFR: JDK-8199884: JDK-8199749 broke build with make 3.81

[Tim Bell]

Erik:

> My consistency check in JDK-8199749 broke the build if using make 3.81.
> We use make 4.0 most of the time internally so I didn't test with older
> make versions. The typical error looks like this:
>
> lib/CompileLibjsig.gmk:92: ***
> /Users/erik/hg/jdk-make381/open/build/macosx-x86_64-normal-server-release/support/modules_libs/java.base/libjsig.dylib.dSYM/Contents/Info.plist
> was not created for
> /Users/erik/hg/jdk-make381/open/build/macosx-x86_64-normal-server-release/support/modules_libs/java.base/libjsig.dylib.
> Stop.
> make[2]: *** [hotspot-jsig] Error 2
>
> My proposed fix adds a condition around these safety checks so that they
> are only performed on known working versions of make.
>
> Webrev: http://cr.openjdk.java.net/~erikj/8199884/webrev.01/
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8199884

Looks good.

/Tim