liblog: statically link tests

Some liblog tests test symbols that aren't otherwise used on the
platform.  Statically link the tests such that we can add version
scripts that expose only the symbols used by the platform, and still
allow the tests to test the rest.

Test: build + unit tests
Change-Id: I898280fa52d31a2c7ad4eafdaa85e8b5f2e87971

liblog/tests/Android.bp

@@ -29,10 +29,10 @@ cc_benchmark {
         "-fno-builtin",
     ],
     shared_libs: [
-        "liblog",
         "libm",
         "libbase",
     ],
+    static_libs: ["liblog"],
     srcs: ["liblog_benchmark.cpp"],
 }
 
@@ -63,10 +63,10 @@ cc_defaults {
         "log_wrap_test.cpp",
     ],
     shared_libs: [
-        "liblog",
         "libcutils",
         "libbase",
     ],
+    static_libs: ["liblog"],
 }
 
 // Build tests for the device (with .so). Run with: