gyp: fix ninja build failure (GYP patch)

Currently the files specified in libraries in node.gyp `cctest` target are
getting a '.lib' extension on windows when generated with ninja.
This commit adds a check to see if a file has a '.obj' extension and in
that case no '.lib' extension will be added.

Also, the LIBS specified in the 'libraries' section are not
being included in the --start-group --end-group section which
means that these libraries will not be searched causing issue
with linkers where the order matters.

PR-URL: nodejs/node#12484
Fixes: nodejs/node#12448
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>

gyp/pylib/gyp/generator/ninja.py

@@ -2091,13 +2091,13 @@ def GenerateOutputForConfig(target_list, target_dicts, data, params,
       restat=True,
       command=mtime_preserving_solink_base % {'suffix': '@$link_file_list'},
       rspfile='$link_file_list',
-      rspfile_content='-Wl,--start-group $in -Wl,--end-group $solibs $libs',
+      rspfile_content='-Wl,--start-group $in $solibs $libs -Wl,--end-group',
       pool='link_pool')
     master_ninja.rule(
       'link',
       description='LINK $out',
       command=('$ld $ldflags -o $out '
-               '-Wl,--start-group $in -Wl,--end-group $solibs $libs'),
+               '-Wl,--start-group $in $solibs $libs -Wl,--end-group'),
       pool='link_pool')
   elif flavor == 'win':
     master_ninja.rule(