hg: jdk/submit: 8236714: enable link-time section-gc for linux to remove unused code

[matthias.baesken at sap.com]

Changeset: 62d7f4566b6d
Author:    mbaesken
Date:      2020-01-24 10:16 +0100
URL:       https://hg.openjdk.java.net/jdk/submit/rev/62d7f4566b6d

8236714: enable link-time section-gc for linux to remove unused code
Reviewed-by: erikj, ihse

! make/autoconf/flags-cflags.m4
! make/autoconf/flags-ldflags.m4
! make/autoconf/jdk-options.m4
! make/autoconf/spec.gmk.in