Contribution of PowerPC port (continuation of 422063005)

test/unittests/unittests.gyp

Index: test/unittests/unittests.gyp
diff --git a/test/unittests/unittests.gyp b/test/unittests/unittests.gyp
index 12992db9c45d24de7586a02e4116d3d6e6367a82..f539c06694234e6a6382fec698b480898980ac3c 100644
--- a/test/unittests/unittests.gyp
+++ b/test/unittests/unittests.gyp
@@ -103,6 +103,11 @@
             'compiler/x64/instruction-selector-x64-unittest.cc',
           ],
         }],
+        ['v8_target_arch=="ppc" or v8_target_arch=="ppc64"', {
+          'sources': [  ### gcmole(arch:ppc) ###
+            'compiler/ppc/instruction-selector-ppc-unittest.cc',
+          ],
+        }],
         ['component=="shared_library"', {
           # compiler-unittests can't be built against a shared library, so we
           # need to depend on the underlying static target in that case.