ARM64: Enable PIE on Android.

BUG=373219
LOG=N
R=rmcilroy@chromium.org

Review URL: https://codereview.chromium.org/287893002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21312 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

build/android.gypi

@@ -215,6 +215,15 @@
               '-fno-stack-protector',
             ],
           }],
+          ['target_arch=="arm64" or target_arch=="x64"', {
+            # TODO(ulan): Enable PIE for other architectures (crbug.com/373219).
+            'cflags': [
+              '-fPIE',
+            ],
+            'ldflags': [
+              '-pie',
+            ],
+          }],
         ],
         'target_conditions': [
           ['_type=="executable"', {