[coreboot] build environment broken again

[Sean McNeil]

Hi Patrick,

The coreboot code is compiling, but FILO still does not:

     CC         arch/x86/exec.libc.o
gcc  -MMD  -Iinclude -Iinclude/x86 -Ibuild -D_LP64=0 
-Icurses/PDCurses-3.4 -Icurses/pdcurses-backend -Icurses/menu 
-Icurses/form -Os -pipe -nostdinc -nostdlib -fno-builtin -ffreestanding 
-fomit-frame-pointer -Wall -Wundef -Wstrict-prototypes 
-Wmissing-prototypes -Wwrite-strings -Wredundant-decls -Wno-trigraphs 
-Wstrict-aliasing -Wshadow -c -o build/arch/x86/exec.libc.o arch/x86/exec.S
<command-line>:0:0: warning: "_LP64" redefined [enabled by default]
arch/x86/exec.S:1:0: note: this is the location of the previous definition
  /*
  ^
arch/x86/exec.S: Assembler messages:
arch/x86/exec.S:43: Error: invalid instruction suffix for `push'
arch/x86/exec.S:45: Error: invalid instruction suffix for `push'
arch/x86/exec.S:52: Error: invalid instruction suffix for `push'
arch/x86/exec.S:53: Error: invalid instruction suffix for `push'
arch/x86/exec.S:54: Error: invalid instruction suffix for `push'
arch/x86/exec.S:61: Error: invalid instruction suffix for `push'
arch/x86/exec.S:62: Error: invalid instruction suffix for `push'
arch/x86/exec.S:70: Error: invalid instruction suffix for `push'
arch/x86/exec.S:73: Error: operand type mismatch for `call'
arch/x86/exec.S:81: Error: invalid instruction suffix for `pop'
arch/x86/exec.S:91: Error: invalid instruction suffix for `pop'
arch/x86/exec.S:92: Error: invalid instruction suffix for `pop'
arch/x86/exec.S:93: Error: invalid instruction suffix for `pop'
arch/x86/exec.S:97: Error: invalid instruction suffix for `pop'