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
Change-Id: I4e43e7cf18a96f22b3a9a08dbab8c3e960c12930
diff --git a/libutils/Android.mk b/libutils/Android.mk
index 631b5a3..3663c52 100644
--- a/libutils/Android.mk
+++ b/libutils/Android.mk
@@ -22,7 +22,6 @@
 	Log.cpp \
 	NativeHandle.cpp \
 	Printer.cpp \
-	ProcessCallStack.cpp \
 	PropertyMap.cpp \
 	RefBase.cpp \
 	SharedBuffer.cpp \
@@ -44,7 +43,7 @@
 # =====================================================
 include $(CLEAR_VARS)
 LOCAL_SRC_FILES:= $(commonSources)
-LOCAL_SRC_FILES_linux := Looper.cpp
+LOCAL_SRC_FILES_linux := Looper.cpp ProcessCallStack.cpp
 LOCAL_CFLAGS_darwin := -Wno-unused-parameter
 LOCAL_MODULE:= libutils
 LOCAL_STATIC_LIBRARIES := liblog
@@ -67,6 +66,7 @@
 	$(commonSources) \
 	BlobCache.cpp \
 	Looper.cpp \
+	ProcessCallStack.cpp \
 	Trace.cpp
 
 ifeq ($(TARGET_ARCH),mips)