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 commit 05217d210e.
This patch is going to fix the bug in commit 05217d210e 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>
c9b3fe1586