Fix typos in binding.gyp (#284)

* Fix typo in binding.gyp

The typo lead to not be able to build as it seems to point to an old naming typo.

* Fix: superfluous spaces in ftdebug filename

binding gyp of FreeType had typo for ftdebug.c file with too many spaces at the end

* Update binding.gyp of PDFWriter

Missing files lead to undefined symbols when loading after compiling.

FreeType/binding.gyp

@@ -56,7 +56,7 @@
 				'./src/type42/type42.c',
 				'./src/winfonts/winfnt.c',
 				'./src/base/ftsystem.c',
-				'./src/base/ftdebug.c   ',
+				'./src/base/ftdebug.c',
                 './include/freetype/config/ftconfig.h',
                 './include/freetype/config/ftheader.h',
                 './include/freetype/config/ftmodule.h',