grub 2.0: several fixes

* Make grub, grub-efi grub_git use a grub2.inc to reduce the duplicated code.

* Make grub and grub-efi use the same patches since they use the same
  source. (grub_git is different).

* grub-efi:
  - Use autotools to replace autotools-brokensep
  - Remove the DEPENDS of freetype, it should be a RDEPENDS.
  - Remove grub-2.00-ignore-gnulib-gets-stupidity.patch since it is a
    duplication of remove-gets.patch.
  - Make grub-efi.rpm contain files rather than make an empty package.

* grub_git:
  - Fix a SSE build failure.

[YOCTO #6310]

(From OE-Core rev: cf4aaed28a34cc652352f0817316187b72babc76)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-bsp/grub/files/remove-gets.patch

@@ -0,0 +1,20 @@
+ISO C11 removes the specification of gets() from the C language, eglibc 2.16+ removed it
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+Upstream-Status: Pending
+Index: grub-1.99/grub-core/gnulib/stdio.in.h
+===================================================================
+--- grub-1.99.orig/grub-core/gnulib/stdio.in.h	2010-12-01 06:45:43.000000000 -0800
++++ grub-1.99/grub-core/gnulib/stdio.in.h	2012-07-04 12:25:02.057099107 -0700
+@@ -140,8 +140,10 @@
+ /* It is very rare that the developer ever has full control of stdin,
+    so any use of gets warrants an unconditional warning.  Assume it is
+    always declared, since it is required by C89.  */
++#if defined gets
+ #undef gets
+ _GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
++#endif
+ 
+ #if @GNULIB_FOPEN@
+ # if @REPLACE_FOPEN@