Don't bootstrap GCC with -mcet

With revision 259496:

commit b1384095a7c1d06a44b70853372ebe037b2f7867
Author: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Thu Apr 19 15:15:04 2018 +0000

    x86: Enable -fcf-protection with multi-byte NOPs

-fcf-protection no longer requires -mcet.

config/

	PR target/85485
	* bootstrap-cet.mk (STAGE2_CFLAGS): Remove -mcet.
	(STAGE3_CFLAGS): Likewise.

gcc/

	PR target/85485
	* doc/install.texi: Remove -mcet from bootstrap-cet.

From-SVN: r259611

config/ChangeLog

 2018-04-24  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/85485
+	* bootstrap-cet.mk (STAGE2_CFLAGS): Remove -mcet.
+	(STAGE3_CFLAGS): Likewise.
+
+2018-04-24  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/85485
 	* cet.m4 (GCC_CET_FLAGS): Replace -mcet with -mshstk.
 
 2018-04-19  Jakub Jelinek  <jakub@redhat.com>

config/bootstrap-cet.mk

-# This option enables -fcf-protection -mcet for stage2 and stage3.
+# This option enables -fcf-protection for stage2 and stage3.
 
-STAGE2_CFLAGS += -fcf-protection -mcet
-STAGE3_CFLAGS += -fcf-protection -mcet
+STAGE2_CFLAGS += -fcf-protection
+STAGE3_CFLAGS += -fcf-protection

gcc/ChangeLog

+2018-04-24  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/85485
+	* doc/install.texi: Remove -mcet from bootstrap-cet.
+
 2018-04-24  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/85511

gcc/doc/install.texi

@@ -2519,7 +2519,7 @@ must be used along with @code{bootstrap-debug-lean} and
 @item @samp{bootstrap-cet}
 This option enables Intel CET for host tools during bootstrapping.
 @samp{BUILD_CONFIG=bootstrap-cet} is equivalent to adding
-@option{-fcf-protection -mcet} to @samp{BOOT_CFLAGS}.  This option
+@option{-fcf-protection} to @samp{BOOT_CFLAGS}.  This option
 assumes that the host supports Intel CET (e.g. GNU assembler version
 2.30 or later).