base: add quick_exit emulation.

Bug: http://b/31468413
Change-Id: Ie15fcb8ff0613d01a0eb7437a2cb37283aa52bab
Test: mma, libbase_test on Linux/Windows
diff --git a/base/Android.bp b/base/Android.bp
index 7bf4c79..e260412 100644
--- a/base/Android.bp
+++ b/base/Android.bp
@@ -28,6 +28,7 @@
         "file.cpp",
         "logging.cpp",
         "parsenetaddress.cpp",
+        "quick_exit.cpp",
         "stringprintf.cpp",
         "strings.cpp",
         "test_utils.cpp",
@@ -71,6 +72,7 @@
         "logging_test.cpp",
         "parseint_test.cpp",
         "parsenetaddress_test.cpp",
+        "quick_exit_test.cpp",
         "stringprintf_test.cpp",
         "strings_test.cpp",
         "test_main.cpp",