Add ANGLE perf tests targets.

This will enable building the ANGLE perf tests on Windows perf bot
builders.

BUG=angleproject:744
BUG=468852
R=sievers@chromium.org, thakis@chromium.org

Review URL: https://codereview.chromium.org/1021763002

Cr-Original-Commit-Position: refs/heads/master@{#322078}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 027aa70482334c1ff20e86f7dec7bdb046a31dcc

all.gyp

@@ -557,6 +557,7 @@
             ['OS=="win"', {
               'dependencies': [
                 '../chrome/chrome.gyp:crash_service',
+                '../gpu/gpu.gyp:angle_perftests',
               ],
             }],
             ['OS=="win" and target_arch=="ia32"', {