Rolling 2 dependencies (google#748)

Roll third_party/spirv-cross/ 02b2a1015..8ee8e60f7 (6 commits)

KhronosGroup/SPIRV-Cross@02b2a10...8ee8e60

$ git log 02b2a1015..8ee8e60f7 --date=short --no-merges --format='%ad %ae %s'
2019-06-28 post Deal with scalar input values for distance/length/normalize.
2019-06-27 post Run format_all.sh.
2019-06-27 post HLSL: Does not support case-fallthrough.
2019-06-27 post Handle more cases with FP16 and texture sampling.
2019-06-26 post Add C API for get_declared_struct_member_size.
2019-06-26 post MSL: De-virtualize get_declared_struct_member_size.

Roll third_party/spirv-tools/ 6ccb52b86..e6e3e2ccc (1 commit)

KhronosGroup/SPIRV-Tools@6ccb52b...e6e3e2c

$ git log 6ccb52b86..e6e3e2ccc --date=short --no-merges --format='%ad %ae %s'
2019-06-28 51214578+jmacnak-nv Update type for loaded builtin GlobalInvocationID in pass instrumentation (#2705)

Created with:
  roll-dep third_party/effcee third_party/glslang third_party/googletest third_party/re2 third_party/spirv-cross third_party/spirv-headers third_party/spirv-tools

DEPS

@@ -9,8 +9,8 @@ vars = {
   'googletest_revision': '437e1008c97b6bf595fec85da42c6925babd96b2',
   're2_revision': '848dfb7e1d7ba641d598cb66f81590f3999a555a',
   'spirv_headers_revision': 'de99d4d834aeb51dd9f099baa285bd44fd04bb3d',
-  'spirv_tools_revision': '6ccb52b86492f8e27383abb821c8a808625c78ed',
-  'spirv_cross_revision': '02b2a1015d2b5a7bf29eec7a8f3fbf62b14a443c',
+  'spirv_tools_revision': 'e6e3e2ccc6a2a9bf43730d8edccf0b1a212d660a',
+  'spirv_cross_revision': '8ee8e60f70f937c72379ab1fc404a1c36d660a31',
 }
 
 deps = {