RFR [XS]: 8238530: OPT_SPEED_SRC list misses some files with cpu-dependend file names

[Baesken, Matthias]

Hello,  please review this small change .

The OPT_SPEED_SRC list (for files to be built optimized for speed) in JVMFeatures.gmk includes a few files with cpu-dependend names for arm
but misses the corresponding files for other cpus (e.g. frame_arm.cpp).  The change adds those files .

Bug/webrev :

https://bugs.openjdk.java.net/browse/JDK-8238530

http://cr.openjdk.java.net/~mbaesken/webrevs/8238530.0/

Best Regards, Matthias