devel/immer: fix build on sparc64

This fails to build on sparc64 because it is marked NO_BUILD but
uses the compiler in the configure stage. When marked NO_BUILD there
is no build depend on ports-clang.

No bump in revision since no package changes.

okay?

Index: Makefile
===================================================================
RCS file: /cvs/ports/devel/immer/Makefile,v
retrieving revision 1.3
diff -u -p -u -r1.3 Makefile
--- Makefile 21 Dec 2024 11:39:33 -0000 1.3
+++ Makefile 26 Dec 2024 16:13:27 -0000
@@ -20,6 +20,9 @@ MODULES = devel/cmake \

BUILD_DEPENDS = devel/catch2

-NO_BUILD = Yes
+# configure stage uses the compiler so can't mark as no build
+#NO_BUILD = Yes
+
+do-build:

.include <bsd.port.mk>