UPDATE: math/fftw3 to disable OpenMP

Disable OpenMP code generation in fftw3.

--John

Index: Makefile
===================================================================
RCS file: /cvs/ports/math/fftw3/Makefile,v
retrieving revision 1.35
diff -u -p -r1.35 Makefile
--- Makefile 20 Apr 2019 07:20:07 -0000 1.35
+++ Makefile 25 Jun 2019 00:25:34 -0000
@@ -16,7 +16,7 @@ SHARED_LIBS= fftw3 7.1 \
fftw3f_threads 1.1
CATEGORIES= math

-REVISION-main= 0
+REVISION-main= 1
REVISION-common= 0

HOMEPAGE= http://www.fftw.org/
@@ -38,6 +38,7 @@ FLAVOR?= double
USE_GMAKE= Yes
CONFIGURE_STYLE=gnu
CONFIGURE_ARGS= --enable-threads
+CONFIGURE_ARGS+= --disable-openmp

.if ${FLAVOR} == "float"
CONFIGURE_ARGS+=--enable-float