[swarming] Isolate shared libraries for linux32.

BUG=chromium:535160
LOG=n

Review URL: https://codereview.chromium.org/1424863002

Cr-Commit-Position: refs/heads/master@{#31608}

build/isolate.gypi

@@ -68,6 +68,8 @@
         '--path-variable', 'PRODUCT_DIR', '<(PRODUCT_DIR)',
 
         '--config-variable', 'OS=<(OS)',
+        '--config-variable', 'component=<(component)',
+        '--config-variable', 'target_arch=<(target_arch)',
         '--config-variable', 'v8_use_external_startup_data=<(v8_use_external_startup_data)',
         '--config-variable', 'v8_use_snapshot=<(v8_use_snapshot)',
       ],

src/base.isolate

@@ -11,5 +11,12 @@
         ],
       },
     }],
+    ['OS=="linux" and component=="shared_library" and target_arch=="ia32"', {
+      'variables': {
+        'files': [
+          '<(PRODUCT_DIR)/lib/',
+        ],
+      },
+    }],
   ],
 }
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