RFR [11] 8207838: AArch64: Float registers incorrectly resture in JNI call

[Andrew Haley]

http://cr.openjdk.java.net/~aph/8207838-2/

The patch failed testing because some arches use very old C compilers.
The only way I could duplicate the problem was with
--std=c90 -Wall -Wextra -pedantic

Maybe we should fix the OpenJDK build system to use such options.

-- 
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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