Boost: Jamfile has two syntaxes for boost libraries

Fixes #2456

mesonbuild/dependencies/misc.py

@@ -814,6 +814,7 @@ BOOST_LIBS = [
     'boost_math_c99f',
     'boost_math_c99l',
     'boost_mpi',
+    'boost_program_options',
     'boost_random',
     'boost_regex',
     'boost_serialization',

tools/boost_names.py

@@ -99,6 +99,10 @@ def get_library_names(jamfile):
         for matches in res:
             if ':' in matches.group(2):
                 libs.append(matches.group(1))
+        res = re.finditer(r'^boost-lib[\s]+([A-Za-z0-9_]+)([^;]*);', jam, re.MULTILINE | re.DOTALL)
+        for matches in res:
+            if ':' in matches.group(2):
+                libs.append('boost_{}'.format(matches.group(1)))
     return libs
 
 def exists(modules, module):