increase objc example build timeout to 1h

tools/run_tests/run_tests.py

@@ -1113,7 +1113,7 @@ class ObjCLanguage(object):
         out.append(
             self.config.job_spec(
                 ["src/objective-c/tests/build_one_example.sh"],
-                timeout_seconds=20 * 60,
+                timeout_seconds=60 * 60,
                 shortname="ios-buildtest-example-sample",
                 cpu_cost=1e6,
                 environ={
@@ -1126,7 +1126,7 @@ class ObjCLanguage(object):
         out.append(
             self.config.job_spec(
                 ["src/objective-c/tests/build_one_example.sh"],
-                timeout_seconds=20 * 60,
+                timeout_seconds=60 * 60,
                 shortname="ios-buildtest-example-switftsample",
                 cpu_cost=1e6,
                 environ={
@@ -1138,7 +1138,7 @@ class ObjCLanguage(object):
         out.append(
             self.config.job_spec(
                 ["src/objective-c/tests/build_one_example.sh"],
-                timeout_seconds=20 * 60,
+                timeout_seconds=60 * 60,
                 shortname="ios-buildtest-example-switft-use-frameworks",
                 cpu_cost=1e6,
                 environ={