Bug#853345: cernlib: ftbfs with GCC-7

a work around can be found at http://launchpadlibrarian.net/332177358/cernlib_20061220+dfsg3-4.3build1_20061220+dfsg3-4.3ubuntu1.diff.gz

Bug#853345: cernlib: ftbfs with GCC-7

Control: forwarded -1 https://gcc.gnu.org/PR81723 Control: tags -1 + moreinfo > gfortran cwerf64.F > E: Build killed with signal TERM after 150 minutes of inactivity that might be a GCC issue, however it would be nice to see the command line arguments passed, and getting a test case extracted.