Fix relative include in userspace comp

Author: jepler

src/hal/utils/halcompile.g

@@ -795,7 +795,9 @@ def build_usr(tempdir, filename, mode, origfilename):
     makefile = os.path.join(tempdir, "Makefile")
     f = open(makefile, "w")
     print("%s: %s" % (binname, filename), file=f)
-    print("\t$(CC) -I$(EMC2_HOME)/include -I/usr/include/linuxcnc -URTAPI -U__MODULE__ -DULAPI -Os %s -o $@ $< -Wl,-rpath,$(LIBDIR) -L$(LIBDIR) -llinuxcnchal %s" % (
+    print("\t$(CC) -I%s -I$(EMC2_HOME)/include -I/usr/include/linuxcnc -URTAPI -U__MODULE__ -DULAPI -Os %s -o $@ $< -Wl,-rpath,$(LIBDIR) -L$(LIBDIR) -llinuxcnchal %s" % (
+
+        os.path.abspath(os.path.dirname(origfilename)),
         options.get("extra_compile_args", ""),
         options.get("extra_link_args", "")), file=f)
     print("include %s" % find_modinc(), file=f)