RFR(S): 8146638: Only use compiler option files if they are really supported by the toolchain

[Volker Simonis]

Hi,

can somebody please review and sponsor (needs regeneration of
generated-configure.sh because of closed sources) the following small
fix:

http://cr.openjdk.java.net/~simonis/webrevs/2016/8146638/
https://bugs.openjdk.java.net/browse/JDK-8146638

Older versions of gcc don't support the '@file' syntax for passing
options to the compiler trough an options file.

So better check during the configuration phase if gcc supports the
'@file' syntax and configure the make appropriately.

Inside NativeCompilation.gmk we now only use compiler option files if
COMPILER_COMMAND_FILE_FLAG was defined during the configure process
(instead of explicitly checking for the sstudio toolchain which
doesn't support compiler option files as well).

Tested with old/new GCC which don't/support @file and on Solaris to
verify the nothing has been broken.

Thank you and best regards,
Volker