wscript: link libm and libdl

cl_dll/wscript

@@ -18,7 +18,7 @@ def configure(conf):
 		conf.fatal('VGUI was enabled but VGUI cannot be used')
 
 def build(bld):
-	libs = ['VGUI', 'SDL']
+	libs = ['VGUI', 'SDL', 'DL', 'M']
 	defines = ['CLIENT_DLL']
 	includes = ['.',
 		'../dlls',

dlls/wscript

@@ -101,6 +101,7 @@ def build(bld):
 		features = 'c cxx',
 		includes = includes,
 		defines  = defines,
+		use      = ['M']
 		install_path = install_path,
 		subsystem = bld.env.MSVC_SUBSYSTEM,
 		idx = bld.get_taskgen_count()

wscript

@@ -175,8 +175,7 @@ def configure(conf):
 			for i in a:
 				conf.check_cc(lib = i)
 	else:
-		if conf.env.GOLDSOURCE_SUPPORT:
-			conf.check_cc(lib='dl')
+		conf.check_cc(lib='dl')
 		conf.check_cc(lib='m')
 
 	if conf.env.COMPILER_CC == 'msvc':