RFR(XXS) 8213948 Solaris-X64 build fails with compact hashtable

[Ioi Lam]

https://bugs.openjdk.java.net/browse/JDK-8213948
http://cr.openjdk.java.net/~iklam/jdk12/8213948-solaris-x64-compact-hashtable-build.v01/

Please review this trivial change. Adding 'inline' fixes build issues
with archaic Solaris X64 compiler. The patch also builds correctly on
all supported platforms (hs-tier1).

Thanks
- Ioi