Don't do horrible magic with CFLAGS and CXXFLAGS

The purpose of the lines being removed is to suppress the
-g<something> option from the CFLAGS or CXXFLAGS, when --enable-debug
is not used. This is stupid because it is up to the user to pass these
flags or not.

But it is not only stupid, but utterly broken: if your CFLAGS contains
a flags like -mfloat-gprs=double, then this option gets truncated to
-mfloat simply because the option contained the -g string!

Completely ridiculous piece of code, so get rid of it.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Index: libhid-0.2.16/m4/md_conf_debugging.m4
===================================================================
--- libhid-0.2.16.orig/m4/md_conf_debugging.m4	2004-11-08 18:16:25.000000000 +0100
+++ libhid-0.2.16/m4/md_conf_debugging.m4	2012-12-12 20:24:50.000000000 +0100
@@ -1,7 +1,7 @@
 AC_DEFUN([MD_CONF_DEBUGGING],
   [
-    CFLAGS=$(echo $CFLAGS | sed -e 's,-g[[^[:space:]]]*,,g')
-    CXXFLAGS=$(echo $CXXFLAGS | sed -e 's,-g[[^[:space:]]]*,,g')
+#    CFLAGS=$(echo $CFLAGS | sed -e 's,-g[[^[:space:]]]*,,g')
+#    CXXFLAGS=$(echo $CXXFLAGS | sed -e 's,-g[[^[:space:]]]*,,g')
     MD_CHECK_ARG_ENABLE(debug,
       [
         DEBUG_FLAG=-g