[8u40] RFR(M): 8050942 : PPC64: implement template interpreter for ppc64le

[Vladimir Kozlov]

It is only ppc64 changes. They were pushed 1.5 months ago into jdk9.
Changes applied cleanly, except assert(EnableInvokeDynamic) in 
interp_masm_ppc_64.cpp. It was remove in jdk9 with 8036956 changes which 
we will not backport.

jdk9 webrev:
http://cr.openjdk.java.net/~asmundak/8050942/hotspot/webrev.01/
jdk9 changeset:
http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/5224135904f8
https://bugs.openjdk.java.net/browse/JDK-8050942