tools/gitignore and gitignore: trivial tools-related stuff

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

.gitignore

 *.o
+*.a
 *.elf
 *.ram
 *.bin
 *.mif
 *.*~
 *~
-tools/zpu-loader
-tools/vuart_console
-tools/genraminit
-tools/genramvhd
-tools/genrammif
-tools/lm32-loader
-tools/wrpc-uart-sw
 wrc_disasm.S
 wrc.ram
 wrc.vhd

tools/.gitignore

+zpu-loader
+vuart_console
+genraminit
+genramvhd
+genrammif
+lm32-loader
+wrpc-uart-sw
+wrpc-w1-read
+wrpc-w1-write