BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1737 User may add other commands before CC command from build_rule.txt for specific purpose. It worked fine before commit05217d210e
. This patch is going to fix the bug in commit05217d210e
to support customized CC command. Signed-off-by: Bob Feng <bob.c.feng@intel.com> Cc: Liming Gao <liming.gao@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>