Ruby script cleanup.

Fix warnings.
Remove 32-bit tests from standard suite because they're not running on most platforms.

test/Makefile

@@ -10,6 +10,7 @@ endif
 CFLAGS += -std=c99 -pedantic -Wall -Wextra -Werror
 #CFLAGS += -Wconversion #disabled because if falsely complains about the isinf and isnan macros
 CFLAGS += -Wno-switch-enum -Wno-double-promotion
+CFLAGS += -Wno-poison-system-directories
 CFLAGS += -Wbad-function-cast -Wcast-qual -Wold-style-definition -Wshadow -Wstrict-overflow \
           -Wstrict-prototypes -Wswitch-default -Wundef
 #DEBUG = -O0 -g

test/rakefile_helper.rb

@@ -300,8 +300,8 @@ module RakefileHelpers
 
   def run_make_tests()
     [ "make -s",                               # test with all defaults
-      "make -s DEBUG=-m32",                    # test 32-bit architecture with 64-bit support
-      "make -s DEBUG=-m32 UNITY_SUPPORT_64=",  # test 32-bit build without 64-bit types
+      #"make -s DEBUG=-m32",                    # test 32-bit architecture with 64-bit support
+      #"make -s DEBUG=-m32 UNITY_SUPPORT_64=",  # test 32-bit build without 64-bit types
       "make -s UNITY_INCLUDE_DOUBLE= ",        # test without double
       "cd #{File.join("..","extras","fixture",'test')} && make -s default noStdlibMalloc",
       "cd #{File.join("..","extras","fixture",'test')} && make -s C89",