Specify buildable target for goma latest client clexe builder

To fix following builders:
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Win%20cl.exe%20Goma%20Latest%20Client%20LocalOutputCache
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/WinMSVC64%20Goma%20Latest%20Client

Change-Id: Ic6acb7b8a123165dcda0fc98d3c07c55bd7de38a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1498746
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#637876}

testing/buildbot/chromium.fyi.json

@@ -3033,6 +3033,11 @@
       "libANGLE"
     ]
   },
+  "Win cl.exe Goma Latest Client LocalOutputCache": {
+    "additional_compile_targets": [
+      "libANGLE"
+    ]
+  },
   "Win7 Builder (dbg) Goma Canary": {
     "additional_compile_targets": [
       "all"
@@ -3077,6 +3082,11 @@
       "libANGLE"
     ]
   },
+  "WinMSVC64 Goma Latest Client": {
+    "additional_compile_targets": [
+      "libANGLE"
+    ]
+  },
   "android-mojo-webview-rel": {
     "gtest_tests": [
       {

testing/buildbot/waterfalls.pyl

@@ -1306,6 +1306,12 @@
           'libANGLE',
         ],
       },
+      'Win cl.exe Goma Latest Client LocalOutputCache': {
+        # Build only chromium's subproject using cl.exe.
+        'additional_compile_targets': [
+          'libANGLE',
+        ],
+      },
       'Win7 Builder (dbg) Goma Canary': {
         'additional_compile_targets': [
           'all',
@@ -1329,6 +1335,12 @@
           'libANGLE',
         ],
       },
+      'WinMSVC64 Goma Latest Client': {
+        # Build only chromium's subproject using cl.exe.
+        'additional_compile_targets': [
+          'libANGLE',
+        ],
+      },
       'android-mojo-webview-rel': {
         'swarming': {
           'dimension_sets': [