RFR(S): 8154209: Remove client VM from default JIB profile on windows-x86 and linux-x86

[Mikael Vidstedt]

Please review the following change which removes the "client" VM from 
the default JIB build profile on windows-x86 and linux-x86:

Bug: https://bugs.openjdk.java.net/browse/JDK-8154209
Webrev (top): http://cr.openjdk.java.net/~mikael/webrevs/8154209/webrev.01/
Webrev (hotspot): 
http://cr.openjdk.java.net/~mikael/webrevs/8154209/webrev.01/hotspot/webrev/


When not including the client VM, the build system automatically creates 
a jvm.cfg which makes -client an alias for -server. At some point in the 
future we may choose to output a warning and/or refuse to start up if 
-client is specified, but at least for now silently falling back on the 
-server VM seems appropriate.

The test/runtime/SharedArchiveFile/DefaultUseWithClient.java test 
assumes that CDS is always compiled in and enabled in the -client VM on 
windows-x86. Since -client will fall back on -server that is no longer 
true, so the test needs to be updated. I added an @ignore and filed the 
following issue to track fixing the test:

https://bugs.openjdk.java.net/browse/JDK-8154204


Testing:

In addition to a standard JPRT push job, Christian Tornqvist helped me 
run the runtime nightly tests and apart from the above mentioned test 
all tests were successful.

Cheers,
Mikael