linux: Lower static initializer expectations after https://codereview.chromium.org/1549913002

BUG=94925
TBR=thestig@chromium.org

Review URL: https://codereview.chromium.org/1545273002

Cr-Commit-Position: refs/heads/master@{#366908}

tools/perf_expectations/perf_expectations.json

-{"linux-release-64/sizes/chrome-si/initializers": {"reva": 364170, "revb": 364170, "type": "absolute", "better": "lower", "improve": 7, "regress": 7, "tolerance": 0, "sha1": "de779422"},
+{"linux-release-64/sizes/chrome-si/initializers": {"reva": 366904, "revb": 366904, "type": "absolute", "better": "lower", "improve": 6, "regress": 6, "tolerance": 0, "sha1": "2f874e39"},
  "linux-release-64/sizes/nacl_helper-si/initializers": {"reva": 271321, "revb": 271321, "type": "absolute", "better": "lower", "improve": 5, "regress": 7, "sha1": "f29296a1"},
  "linux-release-64/sizes/nacl_helper_bootstrap-si/initializers": {"reva": 114822, "revb": 115019, "type": "absolute", "better": "lower", "improve": 0, "regress": 0, "sha1": "228221af"},
- "linux-release/sizes/chrome-si/initializers": {"reva": 281717, "revb": 281717, "type": "absolute", "better": "lower", "improve": 8, "regress": 8, "tolerance": 0, "sha1": "b639bbc4"},
+ "linux-release/sizes/chrome-si/initializers": {"reva": 366904, "revb": 366904, "type": "absolute", "better": "lower", "improve": 7, "regress": 7, "tolerance": 0, "sha1": "d4215bbc"},
  "linux-release/sizes/nacl_helper-si/initializers": {"reva": 271321, "revb": 271321, "type": "absolute", "better": "lower", "improve": 6, "regress": 8, "sha1": "3394be7f"},
  "linux-release/sizes/nacl_helper_bootstrap-si/initializers": {"reva": 114822, "revb": 115019, "type": "absolute", "better": "lower", "improve": 0, "regress": 0, "sha1": "dd908f29"},
  "mac-release/sizes/chrome-si/initializers": {"reva": 281731, "revb": 281731, "type": "absolute", "better": "lower", "improve": 0, "regress": 0, "tolerance": 0, "sha1": "01759b7f"},