fixup! tools: roughly port v8_abseil to gyp

Author: targos

tools/v8_gypfiles/v8.gyp

@@ -2370,6 +2370,8 @@
         '<(ABSEIL_ROOT)/absl/time/civil_time.cc',
         '<(ABSEIL_ROOT)/absl/time/clock.h',
         '<(ABSEIL_ROOT)/absl/time/clock.cc',
+        '<(ABSEIL_ROOT)/absl/time/duration.cc',
+        '<(ABSEIL_ROOT)/absl/time/format.cc',
         '<(ABSEIL_ROOT)/absl/time/internal/cctz/include/cctz/civil_time.h',
         '<(ABSEIL_ROOT)/absl/time/internal/cctz/include/cctz/civil_time_detail.h',
         '<(ABSEIL_ROOT)/absl/time/internal/cctz/src/civil_time_detail.cc',