Fix for linux

This actually is only for OS X. On linux ldconfig must be run after
installing in order to update the library cache. Need to look into how
to get scons to do this for the user.

SConstruct

@@ -37,6 +37,7 @@ env.MergeFlags("-std=gnu99 -Wall -Wextra -Werror -Wno-unused-parameter -Wno-attr
 
 if not env['PLATFORM'] == 'darwin':
     env.MergeFlags("-lrt")
+    env.Append(SHLINKFLAGS = ['-install_name ' + '$TARGET'])
 
 AddOption("--variant",
           dest="variant",
@@ -78,8 +79,6 @@ if os.getenv("CC") == "clang" or env['PLATFORM'] == 'darwin':
     env.Replace(CC="clang",
                 CXX="clang++")
 
-env.Append(SHLINKFLAGS = ['-install_name ' + '$TARGET'])
-
 env["ENV"].update(x for x in os.environ.items() if x[0].startswith("CCC_"))
 
 #rootpath = env['ROOTPATH'] = os.path.abspath('.')