Refine TARGET_GLOBAL_CFLAGS for x86 and x86_64:

       Remove -msse2 for x86 (-mssse3 should be provided by the compiler).
       Remove -fPIC (compiler provides by default).
       Remove -fno-inline-functions-called-once.

Change-Id: Ibb29934224c4eedfff926dc72c3b6342c1861ac9
Merge "Refine TARGET_GLOBAL_CFLAGS for x86 and x86_64:"
Remove the vbox target from the build system.

I've been told this is no longer in use, and it's the only user of
external/grub, which is distressingly out of date.

Change-Id: I434a55e0d68f6db97fa71e294e983ff1802e9ba6
Merge "Remove the vbox target from the build system."
Missed one part of removing the vbox target.

Change-Id: I8edb5252b5e71de042b79cb9eb2a497d89efb773
Merge "Missed one part of removing the vbox target."