Makefile.autotools.in: use TARGET_PATH for compile step

This ensures that the correct build tools are found rather than the host
versions (glib-genmarshal, ..)

package/Makefile.autotools.in

@@ -259,7 +259,7 @@ $(BUILD_DIR)/%/.stamp_configured:
 # Build
 $(BUILD_DIR)/%/.stamp_built:
 	$(call MESSAGE,"Building")
-	$($(PKG)_MAKE_ENV) $($(PKG)_MAKE) $($(PKG)_MAKE_OPT) -C $(@D)/$($(PKG)_SUBDIR)
+	PATH=$(TARGET_PATH) $($(PKG)_MAKE_ENV) $($(PKG)_MAKE) $($(PKG)_MAKE_OPT) -C $(@D)/$($(PKG)_SUBDIR)
 	$(Q)touch $@
 
 # Install to staging dir