gltrace: always display eglSwapBuffer in duration mini map.

eglSwapBuffer call is takes a really short time on the device,
and so doesn't show up at all in the duration minimap. This patch
explicitly sets the duration to be a high enough value so that
eglSwapBuffer is clearly visible.

Change-Id: If59a7c869b5b3f5b39dd130714197c7efabdd0ae
1 file changed