hg: jdk/submit: 8215296: do not disable c99 on Solaris

[matthias.baesken at sap.com]

Changeset: 90909cac17f7
Author:    mbaesken
Date:      2018-12-17 13:47 +0100
URL:       http://hg.openjdk.java.net/jdk/submit/rev/90909cac17f7

8215296: do not disable c99 on Solaris
Reviewed-by: dholmes, ihse

! make/autoconf/flags-cflags.m4