Revert "Merge pull request #9543 from NixOS/staging.post-15.06"

This reverts commit f61176c539, reversing
changes made to a27ca029ee.

Conflicts:
	pkgs/development/libraries/ncurses/default.nix

pkgs/development/web/nodejs/no-xcode.patch

@@ -70,3 +70,24 @@ diff -Naur a/tools/gyp/pylib/gyp/xcode_emulation.py b/tools/gyp/pylib/gyp/xcode_
  
    def AdjustLibraries(self, libraries, config_name=None):
      """Transforms entries like 'Cocoa.framework' in libraries into entries like
+@@ -1018,12 +1033,16 @@
+     # Since the value returned by this function is only used when ARCHS is not
+     # set, then on iOS we return "i386", as the default xcode project generator
+     # does not set ARCHS if it is not set in the .gyp file.
+-    if self.isIOS:
++    
++    try:
++      if self.isIOS:
++        return 'i386'
++      version, build = self._XcodeVersion()
++      if version >= '0500':
++        return 'x86_64'
+       return 'i386'
+-    version, build = self._XcodeVersion()
+-    if version >= '0500':
++    except:
+       return 'x86_64'
+-    return 'i386'
+ 
+ class MacPrefixHeader(object):
+   """A class that helps with emulating Xcode's GCC_PREFIX_HEADER feature.