7069 i386_XARCH should include -m32

@@ -334,11 +334,11 @@
 #
 # compiler '-xarch' flag. This is here to centralize it and make it
 # overridable for testing.
 sparc_XARCH=    -m32
 sparcv9_XARCH=  -m64
-i386_XARCH=
+i386_XARCH=     -m32
 amd64_XARCH=    -m64 -Ui386 -U__i386
 
 # assembler '-xarch' flag.  Different from compiler '-xarch' flag.
 sparc_AS_XARCH=         -xarch=v8plus
 sparcv9_AS_XARCH=       -xarch=v9