Rockbox

I always make rockbox
with "-j #" option (make with multi-process).
But in r16343, "BMP2RB rockboxlog.XXX.bmp" is executed
before bmp2rb is build
Please look at the following log.

This patch can fix it.
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$ make -j 2 -f /home/rockbox/svn/build-sim/22/Makefile all
rm -f bits.o cb_search.o exc_10_16_table.o exc_10_32_table.o exc_20_32_table.o exc_5_256_table.o exc_5_64_table.o exc_8_128_table.o filters.o gain_table.o gain_table_lbr.o hexc_10_32_table.o hexc_table.o high_lsp_tables.o lsp.o lsp_tables_nb.o ltp.o modes.o modes_wb.o nb_celp.o quant_lsp.o sb_celp.o speex.o speex_callbacks.o stereo.o speex_header.o lpc.o vbr.o vq.o window.o resample.o libspeex.a librbspeex.a rbspeexenc.o ../rbspeexenc dep-speex
gcc -g rdf2binary.c -o rdf2binary
gcc -g convbdf.c -o convbdf
MAKE in bitmaps/mono
MAKE in bitmaps/native
gcc -g codepages.c codepage_tables.c -o codepages
AR+RANLIB libbitmapsmono.a
BMP2RB rockboxlogo.320x98x16.bmp
/bin/sh: /home/rockbox/svn/rockbox/tools/bmp2rb: No such file or directory
make[2]: *** [/home/rockbox/svn/build-sim/22/apps/bitmaps/native/rockboxlogo.320x98x16.c] Error 127
gcc -O -ansi -g -c -o scramble.o scramble.c
GENLANG afrikaans.lang
GENLANG bulgarian.lang
GENLANG catala.lang
gcc -O -ansi -g -c -o iriver.o iriver.c
gcc -O -ansi -g -c -o mi4.o mi4.c
gcc -O -ansi -g -c -o gigabeat.o gigabeat.c
gcc -O -ansi -g -c -o gigabeats.o gigabeats.c
gcc -O -ansi -g -c -o telechips.o telechips.c
gcc -DAPPLICATION_NAME=\"bmp2rb\" -g bmp2rb.c -o bmp2rb
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