Add Graph500 benchmark version 3.0.0

g/Graph500/Graph500-3.0.0-foss-2018a.eb

+# Golasowski Martin <martin.golasowski@vsb.cz>, Jiri Hanzelka <jiri.hanzelka@vsb.cz>, 2017 IT4Innovations
+easyblock = 'MakeCp'
+
+name = 'Graph500'
+version = '3.0.0'
+
+homepage = 'http://graph500.org/'
+description = 'Reference code of the Graph500 benchmark.'
+
+toolchain = {'name': 'foss', 'version': '2018a'}
+
+source_urls = ['https://github.com/graph500/graph500/archive/']
+sources = ['graph500-%(version)s.tar.gz']
+
+files_to_copy = [(['src/graph500_reference_bfs', 'src/graph500_reference_bfs_sssp'], 'bin')]
+prebuildopts = 'cd src &&'
+
+sanity_check_paths = {
+  'files' : ['bin/graph500_reference_bfs', 'bin/graph500_reference_bfs_sssp'],
+  'dirs' : []
+}
+
+moduleclass = 'tools'