Fix import/export annotations for v8 targets that are always static

test/cctest/cctest.gyp

Index: test/cctest/cctest.gyp
diff --git a/test/cctest/cctest.gyp b/test/cctest/cctest.gyp
index ff2795592a42483f5571d5cf2d3a4b70a59f77dc..0b015693020c62a9d9c5edfc3626fc3a645ea047 100644
--- a/test/cctest/cctest.gyp
+++ b/test/cctest/cctest.gyp
@@ -429,6 +429,7 @@
           # cctest can't be built against a shared library, so we need to
           # depend on the underlying static target in that case.
           'dependencies': ['../../src/v8.gyp:v8_maybe_snapshot'],
+          'defines': [ 'BUILDING_V8_SHARED', ]
         }, {
           'dependencies': ['../../src/v8.gyp:v8'],
         }],
@@ -479,6 +480,7 @@
         ['component=="shared_library"', {
           # Same as cctest, we need to depend on the underlying static target.
           'dependencies': ['../../src/v8.gyp:v8_maybe_snapshot'],
+          'defines': [ 'BUILDING_V8_SHARED', ]
         }, {
           'dependencies': ['../../src/v8.gyp:v8'],
         }],