Doubts on latest change to MesaLib

[David Shao <davshao%gmail.com@localhost>]

I don't agree with the logic of the following patch to MesaLib's options.mk,
especially from the perspective of OSes other than NetBSD:

@@ -8,14 +8,15 @@ PKG_SUGGESTED_OPTIONS=
 # is also required to support the latest RADEON GPUs, so enable it
 # by default on platforms where such GPUs might be encountered.
 .if (${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "x86_64") && \
-       ${OPSYS} != "SunOS" && ${OPSYS} != "Darwin"
+       ${OPSYS} != "SunOS" && ${OPSYS} != "Darwin" && \
+       (${OPSYS} == "NetBSD" && ${X11_TYPE} == "modular")
 PKG_SUGGESTED_OPTIONS+=                llvm
 .endif