Revert of mojo: make libmojo_public_test_support a static library.

mojo/common/BUILD.gn

Index: mojo/common/BUILD.gn
diff --git a/mojo/common/BUILD.gn b/mojo/common/BUILD.gn
index 7ef74fd5e6b71e4c3a2c7e62fbb0173b205f9241..961c012d07ab02df22c5d7df5b4406d20d3b34a1 100644
--- a/mojo/common/BUILD.gn
+++ b/mojo/common/BUILD.gn
@@ -97,6 +97,12 @@
     "common_custom_types_unittest.cc",
     "common_type_converters_unittest.cc",
   ]
+
+  if (is_linux && !is_component_build) {
+    # This tests dynamically loads libmojo_test_support even in non-component
+    # builds.
+    configs += [ "//build/config/gcc:rpath_for_built_shared_libraries" ]
+  }
 }
 
 test("mojo_common_perftests") {
@@ -107,4 +113,10 @@
     "//mojo/public/cpp/test_support:test_utils",
     "//testing/gtest",
   ]
+
+  if (is_linux && !is_component_build) {
+    # This test dynamically loads libmojo_test_support even in non-component
+    # builds.
+    configs += [ "//build/config/gcc:rpath_for_built_shared_libraries" ]
+  }
 }