Don't clear FONTCONFIG_LIBS and FONTCONFIG_CFLAGS in configure.

Don't clear FONTCONFIG_LIBS and FONTCONFIG_CFLAGS in configure.

The build should no longer fail when linking with --no-add-needed

Previously, configure would clear FONTCONFIG_LIBS and
FONTCONFIG_CFLAGS.  This would break the build when compiling with a
linker that defaults to --no-add-needed.  For example:

  /usr/bin/ld: ftfont.o: undefined reference to symbol 'FcInit'

configure should no longer clear these variables.

Author: Matthias Klose <doko@ubuntu.com>
Date: Mon, 28 Feb 2011 01:02:41 +0100
Added-by: Rob Browning <rlb@defaultvalue.org>
Closes: #554324