cc/gcc: allow CC_EXTRA_CONFIG_ARRAY on baremetal

The final bare-metal compiler is built using the core backend.
Currently the core uses the CC_CORE_EXTRA_CONFIG_ARRAY variable.

While this works as supposed to, this can leave the user puzzled
in the menuconfig, since all he can see is the core options, not
the final options.

Only show the core options if any of the core passes are needed,
and use the final options in the core-backend if we're issuing
the bare-metal compiler.

Signed-off-by: Cody P Schafer <dev@codyps.com>
[yann.morin.1998@free.fr: hide core options if no core pass needed;
use final option in core backend if issuing the bare-metal compiler]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Message-Id: <22181e546ba746202489.1399688067@localhost>
Patchwork-Id: 347586

 commit 608e138586993d3c59c65c2958d9a98cf0d4d1eb

 Author: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

 Date:   Wed Jun 8 21:47:42 2011 +0200

     bump version to 0.9.32.1-git

     Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

 diff --git a/Rules.mak b/Rules.mak

 index fe06c24..a00deea 100644

 --- a/Rules.mak

 +++ b/Rules.mak

 @@ -106,7 +106,7 @@ export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR

  MAJOR_VERSION := 0

  MINOR_VERSION := 9

  SUBLEVEL      := 32

 -EXTRAVERSION  :=

 +EXTRAVERSION  :=.1-git

  VERSION       := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)

  ABI_VERSION   := $(MAJOR_VERSION)

  ifneq ($(EXTRAVERSION),)