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

[Erik Joelsson]

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

/Erik