Don't pass the perl C flags to winebuild.

Make.rules.in

@@ -28,7 +28,7 @@
 SHELL     = /bin/sh
 CC        = @CC@
 CPP       = @CPP@
-CFLAGS    = @CFLAGS@
+CFLAGS    = @CFLAGS@ $(EXTRACFLAGS)
 OPTIONS   = @OPTIONS@ -D_REENTRANT
 X_CFLAGS  = @X_CFLAGS@
 X_LIBS    = @X_LIBS@

programs/winetest/Makefile.in

-EXTRADEFS = `perl -MExtUtils::Embed -e ccflags`
-EXTRALIBS = `perl -MExtUtils::Embed -e ldopts`
-EXTRAINCL = `perl -MExtUtils::Embed -e perl_inc`
-XSUBPPDIR = `perl -MConfig -e 'print $$Config::Config{privlibexp}'`/ExtUtils
 TOPSRCDIR = @top_srcdir@
 TOPOBJDIR = ../..
 SRCDIR    = @srcdir@
@@ -10,6 +6,11 @@ MODULE    = winetest.exe
 APPMODE   = cui
 IMPORTS   = kernel32
 
+EXTRACFLAGS = `perl -MExtUtils::Embed -e ccflags`
+EXTRALIBS   = `perl -MExtUtils::Embed -e ldopts`
+EXTRAINCL   = `perl -MExtUtils::Embed -e perl_inc`
+XSUBPPDIR   = `perl -MConfig -e 'print $$Config::Config{privlibexp}'`/ExtUtils
+
 C_SRCS = winetest.c
 
 EXTRA_SRCS = wtmain.c