Shrink binary size when cross-compiling.

Add these flags in cross-compiling mode:
  CFLAGS="-Os -ffunction-sections -fdata-sections -fvisibility=hidden"
  CXXFLAGS="-Os -ffunction-sections -fdata-sections -fvisibility=hidden"
  LDFLAGS="-Wl,--gc-sections"

Change-Id: I63e2df17711e669f828cd6008f4dc851690ab1dd
Signed-off-by: WenHan Gu <Wenhan.gu@mediatek.com>
1 file changed