Revert some GYP changes that no longer seem to be necessary for NW.js.

Diff with upstream Node can be saved by a few lines with some random
clean-up.

Author: hujiajie

common.gypi

@@ -375,8 +375,8 @@
         ],
       }],
       [ 'OS in "linux freebsd openbsd solaris aix"', {
-        'cflags': [ '-pthread'],
-        'ldflags': [ '-pthread'],
+        'cflags': [ '-pthread', ],
+        'ldflags': [ '-pthread' ],
       }],
       [ 'OS in "linux freebsd openbsd solaris android aix"', {
         'cflags': [ '-Wall', '-Wextra', '-Wno-unused-parameter', ],

deps/openssl/openssl.gyp

@@ -174,7 +174,7 @@
         ]
       }],
       ['is_clang==1 or gcc_version>=43', {
-        #'cflags': ['-Wno-error=unused-command-line-argument', '-Wno-error=parentheses-equality'],
+        'cflags': ['-Wno-old-style-declaration'],
       }],
       ['OS=="solaris"', {
         'defines': ['__EXTENSIONS__'],

node.gyp

@@ -31,7 +31,6 @@
     'node_tag%': '',
     'node_release_urlbase%': '',
     'node_byteorder%': 'little',
-    'python%': 'python',
     'icu_small%': 'false',
     'v8_postmortem_support%' : 'false',
     'V8_LIBBASE%': '<(PRODUCT_DIR)/../nw/obj/v8/libv8_libbase.a',