6482 GRUB won't boot when built with GCC 5
6484 GRUB should specify c89 for GCC 5
Reviewed by: Kim Shrier <kshrier@racktopsystems.com>

*** 1,10 ****
--- 1,11 ----
  #
  # Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  # Use is subject to license terms.
  # Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
  # Copyright 2015, OmniTI Computer Consulting, Inc. All rights reserved.
+ # Copyright 2015 RackTop Systems.
  #
  include ../../Makefile.grub
  include ../Makefile.solaris.defs
  
  .SUFFIXES:
*** 34,44 ****
                    -DUSE_MD5_PASSWORDS=1 -DSUPPORT_SERIAL=1
  $(OPTION_FS)GRUB_CFLAGS += -DFSYS_MINIX=1 -DFSYS_JFS=1 -DFSYS_XFS=1 \
                    -DSYS_VSTAFS=1 -DFSYS_FFS=1 -DFSYS_REISERFS=1
  # GRUB_CFLAGS   += -DSUPPORT_HERCULES=1
  STAGE1_5_CFLAGS = $(STAGE2_CFLAGS) -DNO_DECOMPRESSION=1 -DSTAGE1_5=1
! STAGE2_CFLAGS   = -Os -fno-builtin -nostdinc \
                    $(SERIAL_CFLAGS) $(GRAPHICS_CFLAGS)
  $(STAGE2_NETBOOT)STAGE2_CFLAGS  += $(NETBOOT_CFLAGS)
  #STAGE2_CFLAGS  += $(HERCULES_CFLAGS)
  
  NBLOADER_LINK   = -nostdlib -N -Ttext 0
--- 35,45 ----
                    -DUSE_MD5_PASSWORDS=1 -DSUPPORT_SERIAL=1
  $(OPTION_FS)GRUB_CFLAGS += -DFSYS_MINIX=1 -DFSYS_JFS=1 -DFSYS_XFS=1 \
                    -DSYS_VSTAFS=1 -DFSYS_FFS=1 -DFSYS_REISERFS=1
  # GRUB_CFLAGS   += -DSUPPORT_HERCULES=1
  STAGE1_5_CFLAGS = $(STAGE2_CFLAGS) -DNO_DECOMPRESSION=1 -DSTAGE1_5=1
! STAGE2_CFLAGS   = -Os -fno-reorder-functions -fno-builtin -nostdinc \
                    $(SERIAL_CFLAGS) $(GRAPHICS_CFLAGS)
  $(STAGE2_NETBOOT)STAGE2_CFLAGS  += $(NETBOOT_CFLAGS)
  #STAGE2_CFLAGS  += $(HERCULES_CFLAGS)
  
  NBLOADER_LINK   = -nostdlib -N -Ttext 0