hg: build-infra/jdk9: * Set no-pch-flags aways on platforms where we have no pch header (like solaris)

[magnus.ihse.bursie at oracle.com]

Changeset: 5155b524d557
Author:    ihse
Date:      2015-11-11 15:42 +0100
URL:       http://hg.openjdk.java.net/build-infra/jdk9/rev/5155b524d557

* Set no-pch-flags aways on platforms where we have no pch header (like solaris)
* Reorder solaris flag to match old build better (not sure if it's relevant)

! common/autoconf/flags.m4
! common/autoconf/generated-configure.sh
! make/common/NativeCompilation.gmk