Strip debugging symbols from Linux binaries.

Doing so reduces the size of the package at the expense of being less friendly
to debug using gdb (GNU's debugger).

setup.py

@@ -1,10 +1,13 @@
 from glob import glob
+import platform
 
 from setuptools import Extension, setup
 
 dconv_source_files = glob("./deps/double-conversion/double-conversion/*.cc")
 dconv_source_files.append("./lib/dconv_wrapper.cc")
 
+strip_flags = ["-Wl,--strip-all"] if platform.system() == "Linux" else []
+
 module1 = Extension(
     "ujson",
     sources=dconv_source_files
@@ -17,7 +20,7 @@
     ],
     include_dirs=["./python", "./lib", "./deps/double-conversion/double-conversion"],
     extra_compile_args=["-D_GNU_SOURCE"],
-    extra_link_args=["-lstdc++", "-lm"],
+    extra_link_args=["-lstdc++", "-lm"] + strip_flags,
 )
 
 with open("python/version_template.h") as f: