Don't build against the debugging MSVC runtime in a dbgutil build either

We don't use the debugging runtime in LO's own code in dbgutil builds,
so we shouldn't use it in bundled libs either.

(At one point I did try to use the debugging runtime in a dbgutil
build, but had to give up eventually; too many compilation errors
thanks to using -D_DEBUG which brings in much more strict checks in
the C++ headers. I apparently forgot to fix these makefiles then when
I aborted the attempt.)

Change-Id: I I Iedf765b55ba71b811d7fe3074e4c3129783108fd

libxml2/makefile.mk

@@ -99,9 +99,6 @@ BUILD_DIR=$(CONFIGURE_DIR)
 CONFIGURE_DIR=win32
 CONFIGURE_ACTION=cscript configure.js
 CONFIGURE_FLAGS=iconv=no sax1=yes
-.IF "$(dbgutil)"!=""
-CONFIGURE_FLAGS+=debug=yes
-.ENDIF
 BUILD_ACTION=nmake
 BUILD_DIR=$(CONFIGURE_DIR)
 .ENDIF

libxslt/makefile.mk

@@ -97,9 +97,6 @@ BUILD_DIR=$(CONFIGURE_DIR)
 CONFIGURE_DIR=win32
 CONFIGURE_ACTION=cscript configure.js
 #CONFIGURE_FLAGS=iconv=no sax1=yes
-.IF "$(dbgutil)"!=""
-CONFIGURE_FLAGS+=debug=yes
-.ENDIF
 BUILD_ACTION=nmake
 BUILD_DIR=$(CONFIGURE_DIR)
 .ENDIF