installation fails if `-DMESHES` isn't set

[cwsmith]

Without -DMESHES set, and the following cmake configure command cmake .. -DCMAKE_C_COMPILER=mpicc -DCMAKE_CXX_COMPILER=mpicxx -DCMAKE_INSTALL_PREFIX=../install -DSCOREC_CXX_WARNINGS=OFF the following error is hit during installation (make install).

CMake Error at test/cmake_install.cmake:1521 (file):
  file INSTALL cannot find
  "/Users/dobrev1/code/pumi/pumi-meshes/pipe/pipe.dmg": No such file or
  directory.
Call Stack (most recent call first):
  cmake_install.cmake:91 (include)


make: *** [install] Error 1

It looks like the smoke tests requires those files:

core/test/smokeTesting.cmake

Lines 9 to 26 in 3d621c8

	set(MDIR ${MESHES}/pipe)
	smoke_test(uniform_serial 1
	./uniform
	"${MDIR}/pipe.dmg"
	"${MDIR}/pipe.smb"
	"pipe_unif.smb")
	smoke_test(split_2 2
	./split
	"${MDIR}/pipe.dmg"
	"${MDIR}/pipe.smb"
	"pipe_2_.smb"
	2)
	include(GNUInstallDirs)
	# install the test input files for use in spack post-install tests
	install(FILES "${MDIR}/pipe.dmg" "${MDIR}/pipe0.smb"
	DESTINATION ${CMAKE_INSTALL_DATADIR}/testdata)

Those test inputs should be included with the repo to avoid this.

Thanks to @v-dobrev for reporting this.

[cwsmith]

resolved with #463