checkSource{Runs,Compiles}(Fortran ...) fix

fixes #21307
3.19.0-rc1 regression for CheckSource for Fortran.
fixed-form Fortran 77 style code is deprecated by Fortran standard.
21 jobs for !5378 with fix_check in 11 minutes and 7 seconds (queued for 2 seconds)
detached
Status Job ID Name Coverage
  Build
manual #5263336
linux docker build cmake manual
build:centos6-release
passed #5263333
linux docker build cmake
build:debian10-iwyu

00:11:07

manual #5263337
linux-3.17 linux docker build cmake manual
build:fedora31-ninja
passed #5263335
linux-3.17 linux docker build cmake
build:fedora31-sphinx

00:02:18

passed #5263334
linux-3.17 linux docker build cmake
build:fedora31-tidy

00:02:11

manual #5263339
nonconcurrent xcode-11.7 shell macos cmake manual
build:macos-makefiles
manual #5263338
nonconcurrent xcode-11.7 shell macos cmake manual
build:macos-ninja
manual #5263340
nonconcurrent msvc-19.27 vs2019 shell windows cmake manual
build:windows-vs2019-x64-ninja
 
  Test
created #5263341
x11 linux-3.17 linux docker cmake
test:fedora31-ninja
created #5263343
nonconcurrent xcode-11.7 shell macos cmake
test:macos-makefiles
created #5263342
nonconcurrent xcode-11.7 shell macos cmake
test:macos-ninja
created #5263344
nonconcurrent msvc-19.27 vs2019 shell windows cmake
test:windows-vs2019-x64-ninja
 
  Test Ext
created #5263347
linux docker cuda-rt cmake
test:cuda10.2-nvidia
created #5263345
linux-3.17 linux docker build cmake
test:debian10-ninja
created #5263346
linux-3.17 linux docker build cmake
test:fedora31-makefiles
created #5263348
linux-3.17 linux docker build cmake
test:fedora31-ninja-multi
created #5263349
concurrent xcode-11.7 shell macos cmake
test:macos-xcode
created #5263350
concurrent msvc-19.27 vs2019 shell windows cmake
test:windows-vs2019-x64
 
  External
passed cdash

passed ghostflow-check-master

passed cdash