contrib: do not force the software float ABI on ARM

The toolchain defaults should be correct for the target. This fixes
builds on systems using the VFP registers ("hard-float").

extras/contrib/bootstrap

@@ -263,8 +263,6 @@ case $TARGET in
             EXTRA_CFLAGS=" -mcpu=cortex-a8 -mtune=cortex-a8 -march=armv7-a"
             EXTRA_CFLAGS="$EXTRA_CFLAGS -mfpu=neon -mfloat-abi=softfp"
             EXTRA_CFLAGS="$EXTRA_CFLAGS -O3 -fno-tree-vectorize"
-        else
-            EXTRA_CFLAGS="-msoft-float"
         fi
     ;;
     *86_64*linux*)