f77-zmq: add version 4.3.2 (#15204)

Version 4.3.1 only works with Python3. Version 4.3.2 also works
with Python2. These constraints were not listed before and are added
by this commit.

var/spack/repos/builtin/packages/f77-zmq/package.py

@@ -15,10 +15,12 @@ class F77Zmq(MakefilePackage):
 
     maintainers = ['scemama']
 
+    version('4.3.2', sha256='f1fb7544d38d9bb7235f98c96f241875ddcb0d37ed950618c23d4e4d666a73ca')
     version('4.3.1', sha256='a15d72d93022d3e095528d2808c7767cece974a2dc0e2dd95e4c122f60fcf0a8')
 
     depends_on('libzmq')
-    depends_on('python', type='build')
+    depends_on('python@3:', type='build', when="@:4.3.1")
+    depends_on('python', type='build', when="@4.3.2:")
 
     def setup_build_environment(self, env):
         env.append_flags('CFLAGS', '-O3')