Add ParseInt (and ParseUint).

strtol and family are hard to use correctly, and most callers don't
even try.

Change-Id: I2833622a92cccd4662c0c5bdbbef5eeb4e496914
diff --git a/base/Android.mk b/base/Android.mk
index 51dd736..a09a747 100644
--- a/base/Android.mk
+++ b/base/Android.mk
@@ -26,6 +26,7 @@
 libbase_test_src_files := \
     file_test.cpp \
     logging_test.cpp \
+    parseint_test.cpp \
     stringprintf_test.cpp \
     strings_test.cpp \
     test_main.cpp \