Don't build all of Hammer on AppVeyor just now

Since the port is not finished yet, we remove some source files
and the compilation of examples.

appveyor.yml

@@ -14,5 +14,6 @@ build_script:
     }
 - call "%VS140COMNTOOLS%\..\..\VC\vcvarsall.bat" %VCVARS_PLATFORM%
 - call tools\windows\build.bat
-- call tools\windows\build_examples.bat
+# FIXME(windows) TODO(uucidl): reactivate examples
+# - call tools\windows\build_examples.bat
 - exit /b 0

tools/windows/hammer_lib_src_list

@@ -1,22 +1,14 @@
-asprintf.c 
 platform_win32.c 
 allocator.c 
-benchmark.c 
 bitreader.c 
 bitwriter.c 
 cfgrammar.c 
-datastructures.c 
 desugar.c 
 glue.c 
 hammer.c 
-pprint.c 
-registry.c
-system_allocator.c 
 parsers/action.c 
 parsers/and.c 
 parsers/attr_bool.c 
-parsers/bind.c 
-parsers/bits.c 
 parsers/butnot.c 
 parsers/ch.c 
 parsers/charset.c 
@@ -30,7 +22,6 @@ parsers/indirect.c
 parsers/int_range.c 
 parsers/many.c 
 parsers/not.c 
-parsers/nothing.c 
 parsers/optional.c 
 parsers/permutation.c 	
 parsers/sequence.c 
@@ -41,7 +32,6 @@ parsers/xor.c
 parsers/value.c 
 backends/packrat.c
 backends/llk.c
-backends/regex.c
 backends/glr.c
 backends/lalr.c
 backends/lr.c