io_prop.w fails to compile if QIO is not enabled

[maddyscientist]

Looks like this file is unconditionally looking for qio.h regardless if QIO has been enabled in the make file.

================================================================
PLEASE CHECK COMPILERS: Libraries: gcc. Application: mpicc
================================================================
make[2]: Leaving directory '/home/kate/github/milc_milc/libraries'
mpicc -c -O3 -std=c99 -fopenmp -Wall -Wno-unused-variable -Wno-unused-but-set-variable -Wno-unknown-pragmas -Wno-unused-function -DOMP -DMPI_COMMS   -DCG_OK -DREMAP_STDIO_APPEND    -DFEWSUMS  -DKS_MULTICG=HYBRID  -DKS_MULTIFF=FNMAT   -DCL_CG=BICG      -DC_GLOBAL_INLINE  -DMILC_PRECISION=2     -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE       -I.  -DHAVE_QUDA -DUSE_CL_GPU -DUSE_CG_GPU -DUSE_GF_GPU -DUSE_FL_GPU -DUSE_FF_GPU -DMAX_MIXED  -DSET_QUDA_SUMMARIZE  -DFN -DHISQ_REUNIT_ALLOW_SVD -DHISQ_REUNIT_SVD_REL_ERROR=1e-8 -DHISQ_REUNIT_SVD_ABS_ERROR=1e-8 -DHAVE_DIRAC -DHAVE_KS      -I/scratch/kate/quda-develop/include -I/scratch/kate/quda-develop/tests -I/usr/local/cuda-10.1/include     ../generic_wilson/io_prop_w.c
In file included from ../generic_wilson/io_prop_w.c:117:
../generic_wilson/../include/io_scidac_w.h:4:10: fatal error: qio.h: No such file or directory
    4 | #include <qio.h>
      |          ^~~~~~~
compilation terminated.```