BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1202

Turn on LTO for XCODE.

We need to pass -object_path_lto <file> to the linker to keep source
level debugging working.

OVMF X64 before:
SECFV [14%Full] 212992 total, 30224 used, 182768 free
PEIFV [29%Full] 917504 total, 273256 used, 644248 free
DXEFV [40%Full] 12582912 total, 5096904 used, 7486008 free
FVMAIN_COMPACT [37%Full] 3440640 total, 1290240 used, 2150400 free

After:
SECFV [10%Full] 212992 total, 23064 used, 189928 free
PEIFV [20%Full] 917504 total, 192328 used, 725176 free
DXEFV [33%Full] 12582912 total, 4193632 used, 8389280 free
FVMAIN_COMPACT [33%Full] 3440640 total, 1165352 used, 2275288 free

Signed-off-by: Andrew Fish <afish@...>
Cc: Liming Gao <liming.gao@...>
Cc: Zhiguang Liu <zhiguang.liu@...>
---
BaseTools/Conf/tools_def.template | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)