Release scripts to validate ThreadX port (#254)

test/ports/azrtos_build_tx_gnu.bat

@@ -0,0 +1,17 @@
+@ECHO OFF
+
+ECHO INFO: Building %CD%...
+
+CALL build_threadx.bat
+IF NOT EXIST tx.a (
+    ECHO ERROR: ThreadX library build failed.
+    EXIT /B 1
+)
+
+CALL build_threadx_sample.bat
+IF NOT EXIST sample_threadx.out (
+    ECHO ERROR: ThreadX example build failed.
+    EXIT /B 1
+)
+
+ECHO INFO: Build completed successfully!