lalframe: add help2man to dependencies

ensure man pages are correctly built and packaged

(cherry picked from commit 3b86a78b)

lalframe/debian/control.in

@@ -15,6 +15,7 @@ Build-Depends: debhelper (>= 9),
   python3-numpy,
   swig (>= 3.0.7) | swig3.0 (>= 3.0.7),
   zlib1g-dev,
+  help2man,
   lal-dev (>= @MIN_LAL_VERSION@~),
   lal-octave (>= @MIN_LAL_VERSION@~),
   python-lal (>= @MIN_LAL_VERSION@~),

lalframe/lalframe.spec.in

@@ -24,6 +24,7 @@ BuildRequires: numpy
 BuildRequires: octave-devel
 BuildRequires: python-devel
 BuildRequires: swig >= 3.0.7
+BuildRequires: help2man
 BuildRequires: lal-devel >= @MIN_LAL_VERSION@
 BuildRequires: lal-octave >= @MIN_LAL_VERSION@
 BuildRequires: python2-lal >= @MIN_LAL_VERSION@