gcc fix for row_gcc.cc vbroadcastss
gcc fix for row_gcc.cc vbroadcastss

Bug: libyuv:893
Change-Id: I5b70e6a94356878deb348cbd19c9e1e50b2a18aa
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/2808793
Reviewed-by: Frank Barchard <52415189a3f67d375195cbbb6fdb1f1759498e57@chromium.org>
Reviewed-by: Wan-Teh Chang <4c8a6bdb7a474865f0cc87b679527e8d6e2215d5@google.com>
Commit-Queue: Frank Barchard <52415189a3f67d375195cbbb6fdb1f1759498e57@chromium.org>

lemenkov/libyuv,lemenkov/libyuv,lemenkov/libyuv,lemenkov/libyuv