Add sym_upload tool build rules

Add the build rules for the sym_upload tool to the Android.mk
file.

Bug: 35963292
Test: `mmm external/google-breakpad`, sym_upload tool was built and works.

(cherry picked from commit 0f13a65a4b307f8a87ebf3e9b7761649161912c0)

Change-Id: I08dafe99387c7ff0fb051a3b30d62b33d39d9181
diff --git a/Android.mk b/Android.mk
index a4615db..b61c34b 100644
--- a/Android.mk
+++ b/Android.mk
@@ -107,3 +107,18 @@
     src/common/linux/memory_mapped_file.cc \
     src/tools/linux/dump_syms/dump_syms.cc
 include $(BUILD_HOST_EXECUTABLE)
+
+# sym_upload host tool.
+# =================================================
+include $(CLEAR_VARS)
+LOCAL_MODULE := sym_upload
+LOCAL_MODULE_HOST_OS := linux
+LOCAL_CLANG := true
+LOCAL_LDLIBS := -ldl
+LOCAL_CPP_EXTENSION := .cc
+LOCAL_C_INCLUDES := \
+    $(LOCAL_PATH)/src
+LOCAL_SRC_FILES_linux := \
+    src/common/linux/http_upload.cc \
+    src/tools/linux/symupload/sym_upload.cc
+include $(BUILD_HOST_EXECUTABLE)