CovglTest have additional error check in TEST ProbeError(Call* functions,
use a tricky method here, alias all ProbeError to ProbeErrorANGLE. add
"#define ProbeEror ProbeErrorANGLE" to all covgl source code besides shell.c

Currently for win/mac platform block on $gles1_conform_root/platform/platform.h
conflict with $angle_root/include/platform/Platform.h

Bug: angleproject:2303
Change-Id: I96679968bf539d6ae3bdfc3aa89150381679cbb5
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2117950
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>