Fix windows 64-bit builds

pid_t is 64-bit in 64-bit mingw, but the windows process/thread
functions return a DWORD(uint32_t). Instead of promoting to a pid_t and
fixing the format strings, just use a uint32_t to store the values.

android_thread_id also cannot be a 64-bit pointer, so for windows just
force it to be a uint32_t.

libutils/ProcessCallStack only works under Linux, since it makes heavy
use of /proc. Don't compile it under Windows or Darwin.

Bug: 26957718

(cherry picked from commit 86cf941c480de8d5693a24d3feb45574f5c89a86)

Change-Id: I8d39d1951fea1b3011caf585c983e1da7959f7c0
diff --git a/base/logging.cpp b/base/logging.cpp
index a385902..1741871 100644
--- a/base/logging.cpp
+++ b/base/logging.cpp
@@ -68,7 +68,13 @@
 #include <windows.h>
 #endif
 
-static pid_t GetThreadId() {
+#if defined(_WIN32)
+typedef uint32_t thread_id;
+#else
+typedef pid_t thread_id;
+#endif
+
+static thread_id GetThreadId() {
 #if defined(__BIONIC__)
   return gettid();
 #elif defined(__APPLE__)