Use quadrigraph iso. literal #

Author: erlend-aasland

configure.ac

@@ -923,7 +923,7 @@ fi
 AC_MSG_CHECKING([for the platform triplet based on compiler characteristics])
 if $CPP $CPPFLAGS $srcdir/Misc/platform_triplet.c >conftest.out 2>/dev/null; then
   PLATFORM_TRIPLET=`grep '^PLATFORM_TRIPLET=' conftest.out | tr -d ' 	'`
-  PLATFORM_TRIPLET="${PLATFORM_TRIPLET#PLATFORM_TRIPLET=}"
+  PLATFORM_TRIPLET="${PLATFORM_TRIPLET@%:@PLATFORM_TRIPLET=}"
   AC_MSG_RESULT([$PLATFORM_TRIPLET])
 else
   AC_MSG_RESULT([none])